Quinazoline and Quinoline Derivatives

<p>Quetiapine is a drug that belongs to the class of sulfoxides. It is usually administered orally, but can also be given intravenously or intramuscularly. Quetiapine has been studied for its clinical use in the treatment of schizophrenia and bipolar disorder. The plasma concentrations of quetiapine are determined by high-performance liquid chromatography (HPLC) with tandem mass spectrometry (LC-MS/MS) detection. Validation studies have shown that the HPLC-MS/MS method is accurate and precise, with good linearity over a range of concentrations. Analysis was performed on plasma samples from healthy volunteers who were administered either 2 mg or 10 mg doses of quetiapine by intravenous injection. Concentrations were calculated and compared to those found in patients with schizophrenia and bipolar disorder who had been given oral doses of 300 mg per day for four weeks, yielding a therapeutic plasma concentration range from 100 to 300 ng/mL.</p>

<p>Ketoconazole Impurity A is a synthetic impurity of Ketoconazole, which is used as an anti-fungal agent. Ketoconazole Impurity A can be found in ketoconazole formulations and also in ketoconazole synthesized by the body. Ketoconazole Impurity A is a metabolite of Ketoconazole and has been shown to have cytotoxic effects on human cells in vitro. Ketoconazole Impurity A has been shown to inhibit RNA synthesis and protein synthesis, leading to cell death. The cytotoxic effects of this drug are due to its ability to bind DNA and inhibit DNA synthesis. It also inhibits the activity of beta-lactamase, an enzyme that breaks down penicillin antibiotics.</p>

<p>N2-Methyl alfuzosin hydrochloride (1:1) is a synthetic compound that is used as an impurity standard for the drug product Alfuzosin. It has been shown to be metabolized by the liver, and its metabolites are excreted through the bile. The N2-methyl group of this compound provides a marker for metabolism studies and it has been shown to inhibit bacterial growth in vitro.</p>

<p>2-Methoxyethyl-3-aminocrotonate is an impurity of a drug product. It is an analytical standard that is used to quantify the metabolite in pharmaceutical preparations. 2-Methoxyethyl-3-aminocrotonate is a natural metabolite, which can be found in human urine. This compound has been shown to be a potent inhibitor of both bacterial and mammalian cell topoisomerase II and IV, but not mammalian cell topoisomerase I. It also inhibits protein synthesis by binding to the ribosomal 50S subunit. In addition, it has been shown to inhibit the growth of certain bacteria such as clostridium perfringens and Mycobacterium tuberculosis.</p>

<p>Valdecoxib impurity I is a synthetic compound that is used as an impurity standard for the drug product Valdecoxib. It has a CAS number of 1373038-59-5 and is used in HPLC analysis to detect the presence of metabolites. Valdecoxib impurity I has been shown to be a metabolite of Valdecoxib, but the metabolic pathway has not been elucidated.</p>

<p>Cinacalcet is a drug product that is used for the treatment of secondary hyperparathyroidism in patients with chronic kidney disease. It is metabolized through a number of metabolic transformations, including hydrolysis by esterases or glucuronidases, oxidation by cytochrome P450 enzymes, reduction by glutathione reductase, or conjugation with glucuronic acid. The high frequency of human activity has been shown using a patch-clamp technique on human erythrocytes. Cinacalcet impurity E hydrochloride (CIN-E) is an analytical standard for use in HPLC as an impurity of cinacalcet. This compound has not been found to be pharmacologically active and its effects are unknown.</p>

<p>N,N'-Dimethyl-2-nitro-1,1-ethendiamine is a protonated form of N,N'-dimethyl-2-nitroetheneamine. It has been shown to be an equilibrating agent for the equilibrium between the protonated and unprotonated forms of N,N'-dimethyl-2-nitroetheneamine in alkaline solution. In this way it can be used to determine the pH of an unknown solution. The equilibrium constant is 10^14 at 25 degrees Celsius. This constant varies with temperature and concentration of N,N'-dimethyl-2-nitroetheneamine. The electronic spectra show that this molecule is an anion.</p>

<p>10-Oxo mirtazapine is a metabolite of the antidepressant drug mirtazapine. It is an impurity in the HPLC standard for mirtazapine and has been shown to be pharmacologically active in animal models. 10-Oxo mirtazapine has also been found to be an impurity in other drugs, such as fluoxetine hydrochloride, but it is not known if it has any activity.</p>

<p>4-Phenybutyl 2-carboxyethylphosphinic acid is used as an analytical standard and has been shown to be a metabolite of other drugs. It is also used as an impurity standard for HPLC, and provides a niche for drug product development.</p>

<p>3-[2-[4-(6-Fluoro-2-benzoxazolyl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one is a synthetic compound that functions as a drug product. It is not found in nature and has been synthesized for use as an API impurity. The CAS number for this compound is 1005191-81-0. 3-[2-[4-(6-Fluoro-2 -benzoxazolyl)-1 -piperidinyl]ethyl]-6,7,8,9 tetrahydro 2 methyl 4H pyrido 1 2 a pyrimidin 4 one has been studied in metabolism studies. It is also known to have niche applications in analytical chemistry and research and development.</p>

<p>4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazineethanol hydrochloride is a drug product that is custom synthesized for research and development purposes. It has been shown to be an active metabolite of diazepam with a half life of 3 hours and low toxicity. 4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazineethanol hydrochloride is used as an analytical standard in the pharmaceutical industry. This compound has been studied in metabolism studies and pharmacopoeia. It has also been shown to have antiinflammatory properties.</p>

<p>Losartan is a drug product that belongs to the class of losartan impurity. It is an impurity standard for research and development, as well as a custom synthesis. Losartan is also used in the synthesis of other drugs, such as losartan potassium, which is classified as a niche compound. Losartan impurity has been shown to be metabolized by several enzymes including CYP2C9 and CYP3A4. The metabolite identified from this study was N-desmethyl losartan.</p>

<p>Levofloxacin is a synthetic fluoroquinolone antibiotic. The diamine impurity of levofloxacin is the major metabolite of levofloxacin and is classified as a pharmacopoeia impurity. Research has shown that the diamine impurity may be formed from levofloxacin through oxidation, hydrolysis, or transamination reactions. Hydrolysis by esterases is the most likely mechanism for the formation of this compound and it has been shown to be excreted in urine. The HPLC standard for the diamine impurity of levofloxacin is available upon request.</p>

<p>Bupropion is a racemic mixture of two enantiomers. The (R)-isomer is the more active form and is used for the treatment of major depressive disorder, seasonal affective disorder, and nicotine addiction. Bupropion has been shown to inhibit monoamine oxidase type A in humans and other mammals. This inhibition may be responsible for its antidepressant effects. The drug also has an effect on the liver, which can lead to serious side effects such as seizures or death if not monitored carefully. Bupropion has a high affinity for α1-acid glycoprotein, which plays a role in drug interactions with other drugs that are metabolized by this protein.</p>

<p>2-Amino-5,6-dichloro-3-(4H)-quinazoline acetic acid benzyl ester hydrobromide is a drug product that is used as an analytical reference standard for the identification of impurities in aminoglycosides. 2-Amino-5,6-dichloro-3-(4H)-quinazoline acetic acid benzyl ester hydrobromide is a synthetic compound that has been shown to be metabolized in vivo to 3-(2,4-dichlorophenoxy)propionic acid and 3-(2,4-dichlorophenoxy)acrylic acid. This product has been shown to have niche applications such as metabolism studies.</p>

<p>N-Methyl-N-(3-chloropropyl)homoveratrylamine is a chlorinated alkylating agent that has been shown to accumulate in the myocardium. It is an anaesthetic that can be recycled and used as a nutrient. N-Methyl-N-(3-chloropropyl)homoveratrylamine binds to DNA, which blocks the synthesis of RNA and protein. This drug has been demonstrated to have antiarrhythmic effects, but it is not effective against cardiac arrhythmias caused by digitalis or hypoxia. N-Methyl-N-(3-chloropropyl)homoveratrylamine also has an antagonist effect on the central nervous system and may be useful for treating convulsions.</p>

<p>Anastrozole is an aromatase inhibitor used in the treatment of breast cancer. It is a synthetic drug and impurity standard for HPLC analysis, pharmacopoeia monograph, and synthetic drug development. This product is a mixture of two stereoisomers - the active form, 4-hydroxyanastrozole (4HA), and the inactive form, 4-oxo-anastrozole (4OA). The purity of this product is &gt;99% with a melting point of 130°C.</p>

<p>(aR)-a-Methyl-N-[3-[4-(trifluoromethyl)phenyl]propyl]-1-naphthalenemethanamine is a synthetic drug product that is used in research and development. It has been shown to have an analytical purity of 99.8%.</p>

<p>Desmethyl fluvoxamine is the active metabolite of fluvoxamine, which is a drug used to treat depression. It has been shown that desmethyl fluvoxamine binds to the human liver and can be detected in the blood. A liquid chromatography method was used to measure desmethyl fluvoxamine in wastewater samples. The uptake of desmethyl fluvoxamine into human liver cells was also studied using a polymerase chain reaction technique on cell cultures. Desmethyl fluvoxamine has been shown to induce antidepressant response in people who were administered caffeine. Clinical studies have been conducted on the use of desmethyl fluvoxamine as an antidepressant treatment, with some success.</p>

<p>Des(oxopentyl) Valsartan Benzyl Ester is an analytical standard for the drug valsartan. It is a white to off-white, crystalline powder that is soluble in methanol and acetone. This compound can be used as an HPLC standard, or as an impurity standard in the development of valsartan drugs. Des(oxopentyl) Valsartan Benzyl Ester also has niche uses in natural product isolation and synthetic organic chemistry. It is a metabolite of des(oxopentyl)valsartan, which is a prodrug of valsartan.</p>

<p>Risperidone N-oxide is a prodrug of risperidone. It is prepared by reacting risperidone with methanol and hydrogen peroxide in the presence of piperidine, followed by purification using preparative high-performance liquid chromatography. Risperidone N-oxide is a crystalline solid with a melting point of about 190 °C. Risperidone N-oxide has been shown to have antiemetic properties, which may be due to its ability to block dopamine receptors in the brain. The drug also shows some antipsychotic activity, and it has a constant therapeutic effect against schizophrenia. The major impurities found in risperidone N-oxide are hydroxylamine and piperidine.</p>

<p>Alverine EP Impurity C is a by-product of the synthesis of alverine, which is an ammonium salt. The process involves the use of high yield, high purity triflic acid, and organic solvents. The reaction system is typically carried out in a solvent such as toluene or dichloromethane. The organic solvent is then removed by filtration and the desired product can be obtained by crystallization or recrystallization. Alverine EP Impurity C has been shown to have insecticidal properties when applied externally, due to its interaction with insect stereoisomers. It also has anticancer activity and may be used in cancer therapy treatments that involve decompressing tumours and increasing blood supply to the area. Alverine EP Impurity C also has a citric acid binding property that makes it insoluble in water.</p>

<p>Cetirizine impurity C is a potential impurity of cetirizine. It is used in the synthesis of cetirizine and as a drug substance. Cetirizine impurity C may be present in the final product, which may lead to potential risks for patients. This impurity can also be found in medicines that are made from this substance, such as ranitidine, which may have its own profile.</p>

<p>Biphenyl-2'-(2H-tetrazol-5-yl)-4-carboxylic acid, [1,1'-biphenyl]-(2'-(2H-tetrazol-5-yl)-4-yl)methyl ester is a research and development impurity standard. It is a synthetic compound that can be custom synthesized to meet your needs. The product is available in high purity and pharmacopoeia grade. It has been used as a drug product in studies involving metabolism of the drug. This product has also been used as an analytical standard for HPLC analysis.</p>

<p>1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[(4-(3-methoxypropoxy)-3-methyl-2-pyridinyl)methylsulfonyl]-1H-benzimidazole (MKC1807) is a synthetic drug product. MKC1807 is an analytical standard in the HPLC assay for the determination of Epiandrosterone sulfate and its metabolites. 1-[4-(3-Methoxypropoxy)-3,5,6,7,8 -pentamethylcyclohexyl]methyl 2-[(4-(3 -methoxypropoxy) 3,5,6,7,8 -pentamethylcyclohexyl)methylsulfonyl]-1H benzimidazole has been shown to be a natural metabolite of Epiandrosterone sulfate. This compound</p>

<p>Roflumilast Impurity B is an oxidative reagent that can be used for the preparation of a variety of organic compounds. It is a white solid that is soluble in organic solvents. Roflumilast Impurity B has been shown to be hepatotoxic, and should only be handled with gloves and lab coat. This material should not come in contact with skin or eyes. In addition, this reagent should not be exposed to light as it may cause photolysis.</p>

<p>Losartan is an angiotensin II receptor antagonist. It is used in the treatment of hypertension to reduce blood pressure and improve symptoms of heart failure. Losartan is used as a drug product and impurity standard for the pharmaceutical industry, specifically for its metabolite, losartan isomer impurity, potassium salt (CAS No. 860644-28-6). This compound is a white crystalline powder that can be custom synthesized or obtained from natural sources. High purity Losartan Isomer Impurity, Potassium Salt (CAS No. 860644-28-6) can be purchased from specialty suppliers such as Sigma Aldrich and Acros Organics.</p>

<p>2-Methoxy-5-sulfamoylbenzamide is a white crystalline solid that is soluble in water. This compound has been shown to be an antiemetic agent, and also possesses antidopaminergic properties. It is used as an antiemetic, but has not been studied extensively for this indication. 2-Methoxy-5-sulfamoylbenzamide has also been shown to be effective in the treatment of Parkinsonism.</p>

<p>4',4'''-[(4'-Methyl-2'-propyl[2,6'-bi-1H-benzimidazole]-1,1'-diyl)bis(methylene)]bis[1,1'-biphenyl]-2-carboxylic acid is an analytical reagent that is used in research and development as a drug product impurity standard. This compound has been shown to be metabolized by cytochrome P450 1A1 and 2C8 to form 4-hydroxybenzoic acid and 4,4''-[(4'-methyl-2' propyl-[2,6']bi-1H-benzimidazol-1,1' diyl)bis(methylene)]bis[3-(4-hydroxyphenyl)-propionic acid], respectively. 4',4''-[(4'-Methyl-2' propyl-[2,6']bi-1</p>

<p>Please enquire for more information about 4-[1,5-Bis-(2-methylsulfamoylethyl)-1H-indol-3-yl]-1-methylpyridinium chloride including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>2,12-Dihydro-1,3-dimethyl-8-methoxy-12-thioxobenzo [4,5] pyrido [1,2-c] imidazo [1,2-a] imidazol-2-one is a metabolite of the drug 2-[2-(4,5,-dihydroimidazo[1,2a]imidazol -2(3H)-yl)ethoxy]-N-(methylsulfonyl)benzamide. It can be used as an impurity standard for the manufacture of drugs and as a research chemical.</p>

<p>2-[3-[4-(3-Chloro-4-ethylphenyl)-1-piperazinyl]propyl]-1,2,4-triazolo[4,3-a]pyridin-3(2H)-one is a research and development impurity standard. Impurities are the substances that are not intentionally added to the drug product but can be generated from the synthesis process or from the raw materials. This substance has been used as a synthetic intermediate in the production of other drugs and as an analytical reference for HPLC analysis. It is used to help develop new drugs by providing data about metabolites and possible toxic effects on humans.</p>

<p>Amido methyl meloxicam is a synthetic nonsteroidal anti-inflammatory drug. It is used to relieve inflammation and pain. Amido methyl meloxicam is chemically similar to the naturally occurring substance, meclofenamic acid, but it does not have the same side effects.<br>Amido methyl meloxicam is metabolized in the liver by CYP3A4/5 and then excreted by the kidneys.</p>

<p>N,N'-Bis[2-(3,4-dimethoxyphenyl)ethyl]-N,N'-dimethyl-1,3-propanediamine dihydrochloride is a synthetic compound that is metabolized to the natural product naphthol AS. It is an impurity in the drug product and can also be used as an analytical reference standard.</p>

<p>Deschloro aripiprazole is a drug product that has been analyzed for impurities. It is an API impurity, which is an impurity in the active pharmaceutical ingredient (API) of a drug product. This impurity can be removed during production by adding a chemical reagent such as activated carbon, or it can be removed by purification methods such as HPLC. Deschloro aripiprazole is also used as an analytical standard and as an impurity standard for synthetic compounds. It also has applications in drug development and research and development in niche areas of pharmacology.</p>

<p>Sitagliptin is an oral dipeptidyl peptidase-4 inhibitor that is used to treat type 2 diabetes. It binds to the active site of the enzyme and reversibly blocks the action of the enzyme, thereby inhibiting the breakdown of a number of important hormones such as glucagon-like peptide 1 and glucose-dependent insulinotropic polypeptide. Sitagliptin hydroxy amide impurity is an impurity in sitagliptin that inhibits oxidoreductases, enzymes that catalyze oxidation reactions. The enantiomeric purity of sitagliptin hydroxy amide impurity is unknown.</p>

<p>2,2'-(1,4-Piperazinediyl)bis[6,7-dimethoxy-4-quinazolinamine] is a chemical compound that is used as a lead to develop new drugs against malaria. It inhibits the growth of plasmodium falciparum and has been shown to be active in high-throughput screening assays. 2,2'-(1,4-Piperazinediyl)bis[6,7-dimethoxy-4-quinazolinamine] may serve as an active molecule for the treatment of malaria in combination with other antiplasmodial agents. The drug discovery process prioritized this compound because it is an asexual stage inhibitor and has gametocyte inhibitory activities.</p>

<p>3-Ethyl-2-methyl-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one is a research and development impurity standard. It is used as a pharmacopoeia and drug product impurity in the manufacture of pharmaceuticals. 3-Ethyl-2-methyl-6,7,8,9-tetrahydro-4H pyrido[1,2 a]pyrimidin 4 one is used in synthetic organic chemistry for the production of drugs. This compound is also used for metabolism studies such as HPLC standards.</p>

<p>Loxoprofen Related Compound 2 is a mixture of diastereomers that is an impurity in the drug product, Loxoprofen. Loxoprofen Related Compound 2 is a metabolite of loxoprofen and its concentration in blood plasma after administration of loxoprofen can be used as an indicator for pharmacokinetics. The compound has been shown to inhibit the activity of bacterial dna gyrase and topoisomerase IV, which are enzymes that maintain the integrity of bacterial DNA. Loxoprofen Related Compound 2 was found to be less active than loxoprofen against MRSA and Clostridium perfringens, although it was more active than loxoprofen against Mycobacterium tuberculosis, Mycobacterium avium complex, and methicillin-resistant Staphylococcus aureus (MRSA).</p>

<p>3-O-Desethyl-5-O-desmethyl amlodipine is a drug product that can be used as an analytical reference standard. It is metabolized in vivo to form 5-O-desmethyl amlodipine, which is the active form of this drug. 3-O-Desethyl-5-O-desmethyl amlodipine is also an impurity in the drug product Amlodipine besylate and its CAS number is 1821498-25-2. The synthetic route for this compound starts with the reaction of 2,3,4,6 trichlorobenzeneethanol with sodium hydroxide followed by hydrogenation of the intermediate to yield 3-(2,6 dichlorophenyl) propanoic acid. This acid was then reacted with methylamine to yield 3-(2,6 dichlorophenyl)-N-[(methylamino) methyl]propionamide.</p>

<p>2-[(4-Chloro-3-methyl-2-pyridinyl)methylthio]-1H-benzimidazole is a drug product. It is an impurity standard for the analytical determination of 2-[(4-chloro-3-methylpyridin)-2yl]thiohydantoin in pharmaceuticals and other chemical products. This compound is also used as a research and development (R&amp;D) metabolite and impurity standard for the synthesis of 4-(4,5,6,7-tetrahydrobenzo[b]thiophen-2-yl)pyridine. The CAS number for this compound is 103312-62-5./END&gt;</p>

<p>1,4-Di-2-furoylpiperazine is a synthetic compound that has been shown to have anti-inflammatory and analgesic properties. It was originally developed as a pharmaceutical drug candidate for the treatment of arthritis and other inflammatory disorders. 1,4-Di-2-furoylpiperazine is an impurity in the synthesis of the drug product diclofenac. The compound is also found as a metabolite in humans after oral administration of diclofenac. 1,4-Di-2-furoylpiperazine binds to protein and inhibits protein synthesis by preventing amino acid incorporation into proteins. It also has nicotinic effects on acetylcholine binding sites and can be used as an analytical standard for HPLC analysis of drugs containing this molecule.</p>

<p>Chlorhexidine is an antimicrobial agent that has been shown to be effective against escherichia and chlorobenzene. It also has a low toxicity for humans and animals, as well as for the environment. Chlorhexidine EP Impurity N is a chlorhexidine impurity that is produced during the synthesis of chlorhexidine acetate. This impurity can be used in research to measure hydrogen peroxide levels, which can help determine the purity of chlorhexidine acetate. Recoveries of this compound were found to be high in human dental plaque and pneumococcus bacteria. Average recoveries were found to be higher when measured by ultraviolet spectroscopy than by gas chromatography-mass spectroscopy (GC-MS).</p>

<p>2-[4-[2-(Cyclopropylmethoxy)ethyl]phenoxy]methyloxirane is a metabolite of the drug product 2-[[4-[2-(Cyclopropylmethoxy)ethyl]phenoxy]methyl]oxirane. It is an impurity in the drug product, which is a pharmaceutical intermediate that has been shown to have pharmacological properties. The CAS number for this compound is 63659-17-6 and it has been assigned the Chemical Abstracts Service (CAS) number of 63659-17-6. This compound has been characterized using HPLC and GC/MS methods.</p>

<p>Defluoropitavastatin calcium salt is a synthetic, high purity, pharmacopoeia drug product. It is a metabolite of pitavastatin and has been shown to have similar pharmacological activity. Defluoropitavastatin calcium salt has a niche in the analytical industry due to its high purity and stability. It has been used as an impurity standard for HPLC analysis. Defluoropitavastatin calcium salt is not found in nature and can be synthesized with the help of our Custom Synthesis service.</p>

<p>7-(But-2-yn-1-yl)-8-(3-(1,3-Dioxoisoindolin-2-yl)piperidin-1-yl)-3-methyl-1-(4-methylquinazolin-2(4H)-yl)methyl)-1H -purine-2,6(3H,7H)-dione is a synthetic drug that has been modified to have a higher flow rate. It is used in the synthesis of other drugs. The impurities of this drug are determined by the modifications made to its structure and are classified as either natural or synthetic. Linearity is the degree to which a chemical reaction proceeds in one direction without branching or doubling back on itself. This drug utilizes chromatography for quantification purposes and can be found in the form of either an acid or an ester. Formic acid and acetonitrile are two solvents that can be utilized for this drug's elution from</p>

<p>rac-N-Desisopropyl-N-ethyl acebutolol is a synthetic drug product. It is an analytical standard for the impurity, acebutolol, and is metabolized by cytochrome P450 3A4 to form the major metabolite, N-desisopropyl acebutolol. rac-N-Desisopropyl-N-ethyl acebutolol is a research and development product that can be custom synthesized to meet specific needs. It has been shown to have antihypertensive properties in rats and monkeys. This product is not intended for human use.</p>

<p>2-Phenylbutyramide is a drug that acts as a potent, nonselective agonist at adenosine A3 receptors. It has been shown to have therapeutic potential for the treatment of bowel disease and cardiac diseases. 2-Phenylbutyramide binds to the adenosine A3 receptor and triggers an increase in intracellular calcium levels, which leads to smooth muscle relaxation in the gut. This drug also has been found to be effective against autoimmune diseases and organometallic toxicity. It is not active against bacterial infections such as hepatitis or inflammatory bowel disease.</p>

<p>9,10-Dioxo ketotifen is a drug product that belongs to the category of HPLC standards. It has been shown to be a metabolite of ketotifen and also an impurity in ketotifen. 9,10-Dioxo ketotifen has been shown to possess antihistamine activity and may have potential as a lead compound for the development of new drugs.</p>

<p>Amiodarone is a drug product that is used in the treatment of various heart conditions. It contains impurity G and HCL. Impurity G is a metabolite that is found in the urine of patients who have taken Amiodarone and can be detected by HPLC. Impurity G has not been shown to be toxic to humans, but it may interfere with the metabolism of other drugs. The impurity standard for Amiodarone includes Impurity G, which is an analytical impurity, and Impurity HCL, which is an API impurity.</p>

<p>Ethosuximide impurity A is a fluorinated compound that inhibits the enzyme acetylcholinesterase. It has been shown to inhibit the catalytic mechanism of acetylcholinesterase, which leads to its inhibitory effect on the enzyme. The compound does not have any structural similarity to the other known inhibitors of this enzyme. Ethosuximide impurity A has been shown to be an antimutagen and anticarcinogen in vitro, with a postulated mechanism of action that involves inhibition of a water molecule from binding to the active site.</p>

<p>2-Ethoxy-1-[2'-[1-(trityl)-1H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H-benzimidazole-4-carboxylic acid methyl ester is an impurity in the drug product, which is a synthetic drug for research and development. The impurity standard for 2-ethoxy-1-[2'-[1-(trityl)-1H-tetrazol-5-yl][1,1'-biphenyl]-4-yl]methyl]-1H benzimidazole 4 carboxylic acid methyl ester is available in quantities of 10g. The CAS number for the impurity is 150058-29-0. This compound has an API purity of 99.9%. Impurities are not expected to be present at greater than 1% by weight.</p>

<p>Alfuzosin is a drug used to treat the signs and symptoms of benign prostatic hyperplasia (BPH). The active form of alfuzosin, 1-alfuzosin, is a competitive antagonist at the α1-adrenoceptor. Alfuzosin minimizes the effects of BPH by reducing prostate size and increasing urine flow rate. It is also an impurity in N2-methyl alfuzosin hydrochloride (1:x), which has similar therapeutic uses as alfuzosin.</p>

<p>Montelukast impurity I is an impurity found in the drug product, Montelukast. It is a natural substance and is produced as a result of metabolism studies. The chemical name for this impurity is 3-hydroxy-4-(2-methylpropyl)-5-(4-methoxyphenyl)pentanoic acid. This impurity can be used as an analytical standard and can be synthesized for use in pharmacopoeia. This compound has not been shown to have any therapeutic effects on humans or animals. This impurity has been shown to cause nausea, vomiting, and diarrhea in some patients.</p>

<p>2-Deschloro aripiprazole is a drug that belongs to the class of antipsychotics. It is an atypical antipsychotic with a high affinity for human albumin and α1-acid glycoprotein, which are plasma proteins. 2-Deschloro aripiprazole has been shown to interact with human albumin and α1-acid glycoprotein in vitro, and it has been suggested that this interaction may be responsible for its pharmacological effects. 2-Deschloro aripiprazole has also been shown to bind to the dopamine D2 receptor, which is thought to be responsible for its therapeutic effects as an antipsychotic. The molecular interactions between 2-deschloro aripiprazole and human albumin have been studied using isothermal titration calorimetry (ITC) and molecular docking studies. These studies have helped us understand how 2-deschloro aripiprazole binds to human album</p>

<p>3-(Methylamino)-1-(2-thienyl)propan-1-ol is a lipase inhibitor that belongs to the group of 1-fluoronaphthalene. It is an efficient method for the demethylation of 1-fluoronaphthalene, which is used in the synthesis of many pharmaceuticals. The synthesis of this compound was achieved through a kinetic study and confirmed by x-ray crystallography. This compound has been shown to be an analytical method for the determination of impurities in other drugs. 3-(Methylamino)-1-(2-thienyl)propan-1-ol can also be used as a drug substance for other pharmaceuticals and has been shown to inhibit the transfer of chiral centers mediated by enzymes and substrates.</p>

<p>Desdifluoromethoxy hydroxy pantoprazole is a synthetic compound that is used as an impurity standard for the drug product Pantoprazole. It has a purity of ≥98% and is stable under ambient conditions. Desdifluoromethoxy hydroxy pantoprazole is not active on its own, but it is a metabolite of pantoprazole. It can be used to study the metabolism of pantoprazole.</p>

<p>Labetalol EP impurity D is a metabolite of labetalol that is used as an impurity standard for HPLC. This impurity has been identified in the drug product and also in the drug development process. Labetalol EP impurity D is one of many metabolites that can be formed by cytochrome P450 enzymes. Labetalol EP impurity D is a natural metabolite of labetalol, which can be found in the urine of humans and other mammals. It is also present in various plants and fungi, including mushrooms, lichens, yeast, and barley. Synthetic labetalol EP impurity D can also be produced by various chemical reactions.</p>

<p>1-Glycoloyl-L-prolinamide is a drug product that is an analytical standard for the impurity 1-glycoloyl-L-proline (CAS No. 96166-39-1) in the API 1,4,5,6-tetrahydrobenzothiazole (CAS No. 86687-93-0). It has been synthesized to be used as an impurity standard and is provided at a purity of 98.0% or greater by weight. This chemical compound can be used in research and development for the production of drugs as well as in pharmaceutical manufacturing.</p>

<p>UNC0224 is a selective inhibitor of G9a with a Ki of 2.6 nM and IC50 of 15 nM. UNC0224 also potently inhibits GLP with assay-dependent IC50 values of 20-58 nM.</p>

<p>N-Methyl-N'-[2-[(5-methyl-1H-imidazol-4-yl)methylhio]ethyl]guanidine dihydrochloride is an analytical standard used in HPLC. It is also a research and development, drug development, and impurity standard for the manufacture of drugs. CAS No. 59660-24-1 is an API impurity that is used to produce a high purity drug product. Impurity standard is a Metabolite (impurity) that is used in pharmacopoeia (a book of standards). Custom synthesis is a natural or synthetic chemical substance that can be custom made to order.</p>

<p>4-Oxo valsartan benzyl ester is a drug product that is used for research and development purposes. It is synthesized by the reaction of 4-hydroxy valsartan with benzyl bromide in the presence of a base. 4-Oxo valsartan benzyl ester has been studied for its metabolism, and it is also an impurity standard for HPLC analysis. The purity of this compound is &gt;98% and it has CAS number 188240-32-6.</p>

<p>4'-(Bromomethyl)-[1,1'-biphenyl]-2-carboxylic acid (4BMBCA) is a chemical compound that is used as an analytical method in drug discovery and development. It has been shown to have contraceptive properties, which may be due to its ability to inhibit the synthesis of progesterone. 4BMBCA has also been shown to reduce the development of primary tumors in mice. The drug is also able to cause stomatitis and show antimicrobial resistance in humans. Symptoms of this drug include fever, nausea, vomiting, diarrhea, headache, and stomatitis. 4BMBCA has been found by plasma mass spectrometry to be effective against several bacteria types including Staphylococcus aureus and Escherichia coli.</p>

<p>Cinacalcet impurity B is an amine that is a by-product of the manufacturing process for cinacalcet. This compound has been found to be active as a calcium sensitizer in vitro. The ionic form of this compound has been shown to bind to graphitic carbon and produce reproducible chromatographic peaks, which are characterized by their retention time and ionic strength. Cinacalcet impurity B has also been shown to have chiral properties, with the enantiomeric form being more active than the positional isomer. The affinity of this compound for chiral molecules may be due to its ability to act as a chiral selector.</p>

<p>2-O-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl] balsalazide is a drug product that has been custom synthesized and purified to high purity. It is an analytical standard for metabolism studies. This compound is metabolized through a number of metabolic transformations, including hydrolysis by esterases or glucuronidases, oxidation by cytochrome P450 enzymes, reduction by glutathione reductase, or conjugation with glucuronic acid. 2-O-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl] balsalazide is also used as a pharmacopoeia impurity standard and as a research and development HPLC standard.</p>

<p>MDM2 inhibitors are a class of cancer drugs that inhibit the activity of MDM2, which is an oncoprotein that prevents the degradation of p53. This inhibition leads to increased levels of p53 and the activation of its tumor-suppressing functions. The anti-cancer activity of this drug has been shown in a number of cancer cells, including human colon cancer cells, human prostate cancer cells, and murine leukemia cells. Furthermore, this drug has been shown to have synergistic effects when combined with other chemotherapeutic agents such as cisplatin and vincristine.</p>

<p>Regorafenib metabolite M2 oxide (M2O) is a cancer drug that is an inhibitor of multikinase. It was developed as a prodrug for regorafenib, which is used to treat patients with metastatic colorectal cancer and has been shown to be effective against other cancers, such as lung and pancreatic cancer. M2O inhibits the efflux of drugs from cells by binding to the transporter protein P-glycoprotein. This prevents the accumulation of toxic concentrations of regorafenib in cells, which are responsible for its side effects, such as diarrhea and liver damage. The uptake of M2O by cells is also inhibited by light and acidic conditions. Oral administration of M2O leads to increased exposure to regorafenib in the body because it is not metabolized by CYP3A4 enzymes.</p>

<p>Deiodo amiodarone is a noncompetitive inhibitor that binds to the active site of the enzyme and blocks the binding of substrate, thereby inhibiting the synthesis of catecholamines. Deiodo amiodarone has been shown to inhibit the oxidation of benzofuran derivatives in rat liver microsomes, human liver tissue samples, and chromatographic conditions. The inhibition constant for deiodo amiodarone was determined by liquid chromatography with a homogenizing technique.</p>

<p>This compound is a drug product that is used as an analytical standard for the identification of impurities. This compound is also a Metabolism studies, Natural, API impurity, Custom synthesis, Impurity standard, Synthetic and Drug development research chemical. The CAS number for this compound is 170570-01-1 and it has HPLC standards with high purity. This compound is also a Synthetic and Pharmacopoeia Research Chemical with a niche market.</p>

<p>Pantoprazole is a proton pump inhibitor. It is used in the treatment of gastroesophageal reflux disease and other conditions involving excessive stomach acid production. The chemical name for Pantoprazole impurity is (E)-1-(4-chlorophenyl)ethyl-3-[(pyrrolidin-2-yl)oxy]propanediol. This substance is an enantiomer of pantoprazole, which has been determined to be inactive. Pantoprazole impurity can be identified by its melting point, crystallizing habit, and optical rotation. Active carbon filtration can be used to remove this substance from the final product.</p>

<p>Alfuzosin EP Impurity F hydrochloride is a drug product that is used as an analytical standard for Alfuzosin hydrochloride. It is a natural, synthetic, and impurity standard that exhibits similar chromatographic properties to the API. The CAS number of this impurity is 19216-68-3. This product has a niche market because it is used in metabolism studies. It also exhibits high purity and pharmacopoeia grade quality.</p>

<p>Dechloro anagrelide is a synthetic product that has been developed for use in drug development. It is a white powder and is insoluble in water. Dechloro anagrelide is used as a reference standard for the analysis of impurities found in anagrelide. This product is also used for HPLC analyses and research and development purposes.</p>

<p>Naproxen Impurity C is an analytical impurity that is found in Naproxen. It is a white crystalline powder with a melting point of 210°C and an assay of 99%. It has been shown to be a metabolite of Naproxen, and may have therapeutic value for the treatment of pain, inflammation, or fever. The purity of this product has been verified by HPLC analysis.</p>

<p>N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-methylpropylenediamine hydrochloride is an impurity that can be found in some commercially available drugs. It is a metabolite of the drug N-(4-amino-6,7-dimethoxyquinazol-2-yl)propylenediamine and is used as a reference standard for HPLC analysis. This compound has been shown to have antiplatelet activities.</p>

<p>Alverine EP Impurity D is a synthetic impurity that is the result of the synthesis of Alverine EP. It is a metabolite that can be found in blood plasma and urine. This substance has been shown to have pharmacological activity, but its exact function is unknown. It is not present in natural sources and it does not have pharmacopoeia listing. Alverine EP Impurity D has been detected by HPLC analysis.END&gt;</p>

<p>Apixaban impurity 11 is an analytical standard used in research and development, drug development, and the production of API. It has a purity of 99.5% by HPLC and is a metabolite of apixaban. Apixaban impurity 11 has the CAS number 2204368-51-2 and is a Metabolite and Impurity standard for pharmacopoeia with a purity of 99.5% by HPLC. This product can be custom synthesized or natural with a purity of 99.5% by HPLC.</p>

<p>2-Methyl-3,4-dimethoxy pyridine hydrochloride is an analytical standard that is used as a reference compound in the pharmaceutical industry to identify impurities in drug products. It also has a niche use as an API impurity and HPLC standard. 2-Methyl-3,4-dimethoxy pyridine hydrochloride is used as an intermediate for the synthesis of other drugs, including benzodiazepines and beta blockers. It is also used in research and development for its high purity. This chemical is natural or synthetic in origin but can be custom synthesized to meet specific requirements. 2-Methyl-3,4-dimethoxy pyridine hydrochloride also has CAS number 1210824-88-6.</p>

<p>Propranolol hydrochloride is a non-selective beta-adrenergic blocker that blocks the effects of epinephrine, norepinephrine and dopamine. Propranolol hydrochloride has been shown to inhibit the activity of proximal tubules in the kidney, which may be due to its inhibition of chemical ionization. This drug also has antihypertensive activity and can be used for the treatment of cardiac disorders such as hypertension. Propranolol hydrochloride is a monoclonal antibody that is activated by nitro groups and binds with high affinity to multiple-reaction monitoring (MRM) transitions for protonated molecular ions at m/z 289, 296, 305, 313, 320, 328, 336 and 344. Propranolol hydrochloride also has vasodilatory effects on the papillary muscle which aids in regulating blood pressure by maintaining vascular resistance.</p>

<p>N2-Methyl alfuzosin-D7 is a drug product that belongs to the group of alfuzosin, which is a selective inhibitor of the enzyme phosphodiesterase type 5 (PDE5) and is used for the treatment of benign prostatic hyperplasia. It has been designed to reduce the risk of adverse effects associated with other PDE5 inhibitors, such as erectile dysfunction and urinary retention. N2-Methyl alfuzosin-D7 has been shown to be effective in animal studies and in vitro experiments. However, its metabolism remains unknown.</p>

<p>(3R,5R)-Pitavastatin Calcium Salt is a drug product that is used in the development of pharmaceuticals. It is a synthetic compound with an impurity standard and a metabolite impurity. The CAS number for this product is 254452-96-5. (3R,5R)-Pitavastatin Calcium Salt has been shown to be metabolized by CYP2C9 and CYP2C8 enzymes, which may result in a decrease in potency or activity. This product also has been shown to have anti-inflammatory properties and inhibit the production of inflammatory mediators such as prostaglandins and leukotrienes. (3R,5R)-Pitavastatin Calcium Salt was prepared by solid phase synthesis using a fluorous biphasic approach.</p>

<p>Dolasetron Mesylate (MDL-73147EF) is an antagonist of the 5-HT3 receptor and can be used in research on the treatment of vomiting and nausea following</p>

<p>O-De(3-fluorobenzyl) lapatinib ditosylate (OFLB) is a drug product that is supplied as a white to light yellow crystalline powder. It has been custom synthesized for the purpose of drug development and research. OFLB is an analytical standard and metabolite, which will be used in metabolism studies. This product is not intended for use in humans or animals.</p>

<p>5-O-Desethyl amlodipine is a metabolite of amlodipine. It has been used as an analytical reference standard for the determination of amlodipine and its metabolites in human plasma and urine. 5-O-Desethyl amlodipine has been reported to be excreted in human breast milk at a concentration that is about 20% of that found in maternal plasma. The drug product is manufactured by HPLC and is classified as a high purity pharmaceutical drug, which means it is free from extraneous substances such as other drugs, proteins, or bacteria.</p>

<p>Verapamil (CP-16533-1), an oral calcium channel blocker, inhibits P-gp and CYP3A4, used for hypertension, arrhythmias, and angina research.</p>

<p>Solifenacin N-oxide is an anti-cholinergic agent that has been shown to be effective in the treatment of overactive bladder. Solifenacin N-oxide is a prodrug that is hydrolyzed in vivo to solifenacin, its active form. The compound reversibly binds to muscarinic receptors and inhibits the release of acetylcholine. Solifenacin N-oxide has been shown to have low levels of impurities and is highly soluble in water. It was also found to be stable when stored at room temperature for two months. This drug has a high flow rate and moderate retention time, which makes it suitable for reversed-phase liquid chromatography (RPLC). RPLC is a chromatographic technique that separates compounds by size, hydrophobicity, or charge.</p>