Derivados de Quinazolina y Quinolina

<p>Verapamil (CP-16533-1), an oral calcium channel blocker, inhibits P-gp and CYP3A4, used for hypertension, arrhythmias, and angina research.</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>2-[[(4-Chloro-3-methyl-2-pyridinyl)methyl]sulfinyl]-1H-benzimidazole (CAS No. 168167-42-8) is a synthetic compound that is used as an analytical reference standard for HPLC. It is also used in the study of drug metabolism, and it has been shown to induce natural oxidation in vitro. 2-[(4-Chloro-3-methylpyridinium)methylsulfinyl]-1Hbenzimidazole is an impurity found in pharmaceutical products that are synthesized from 1-(2,4,6trichlorophenyl)-3-[(4chloromethyl)phenyl]urea.</p>

<p>Chloromethyl olanzapinium chloride is an analytical reference material that can be used as a standard for HPLC-UV analysis. It is also used in the development of new drugs and as an impurity standard during drug manufacturing. Chloromethyl olanzapinium chloride has been shown to be a metabolite of Olanzapine, which is a niche drug product that is not commercially available. Chloromethyl olanzapinium chloride is listed by the USP, EP and JP as a drug product impurity. It can be synthesized from natural or synthetic sources.</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>Please enquire for more information about (2Z)-1-[5,6-Dihydro-3-(trifluoromethyl)-1,2,4-triazolo[4,3-α]pyrazin-7(8H)-yl]-4-(2,4,5-trifluorophenyl)-2-buten-1-one including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>(1-Ethyl-1-methylpropyl)benzene is an impurity of some drugs. It is a metabolite of the drug, and can be found in urine or blood samples as a result of its excretion from the body. (1-Ethyl-1-methylpropyl)benzene is used as an analytical standard for HPLC analysis. This chemical is not on the USP list of impurities, but it is listed on the pharmacopoeia. The CAS number for (1-Ethyl-1-methylpropyl)benzene is 1985-97-3.</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>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>Captopril EP Impurity N is a synthetic impurity found in Captopril EP, which is used as a drug product for the treatment of hypertension. The impurity standard for Captopril EP Impurity N is available on request.</p>

<p>1-[[3-Methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]-2-[[[3-methyl-4-(2,2,2-trifluoroethoxy)-2-pyridinyl]methyl]thio]-1H-benzi midazole is a high purity analytical standard that is used to calibrate HPLC. It is found as an impurity in the drug product and as a metabolite. 1-[(3-Methyl-4-(2,2,2 -trifluoroethoxy) - 2 - pyridinyl) methyl] - 2 - [[[3 - methyl (4 ( 2 , 2 , 2 - trifluoroethoxy) - 2 pyridinyl) methyl] thio] - 1 H benzimidazole is the IUPAC name for this compound. This chemical has been synthesized</p>

<p>3-(Methylamino)-5,6-dihydro-2H-1,4-thiazin-2-one oxime hydrochloride is an analytical reagent used for HPLC analysis of the impurities in pharmaceutical products. It is a white crystalline solid with a melting point of 235°C. 3-(Methylamino)-5,6-dihydro-2H-1,4-thiazin-2-one oxime hydrochloride is used as a reference standard and has been assigned CAS No. 112233-23-5 by the Chemical Abstracts Service (CAS). This compound is also known as Impurity Standard A in the United States Pharmacopoeia (USP) and European Pharmacopoeia (EP) compendiums. 3-(Methylamino)-5,6-dihydro-2H-1,4-thiazin-2-one oxime</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>Bis-[[2-[1-methylamino-2-nitroethenamine]ethyl]thio]methane is a drug product that has been synthesized for research and development. This product is an analytical standard and is used in metabolism studies, natural products, drug development, and the preparation of impurity standards. The CAS number for this product is 1331637-48-9. This product is a synthetic compound that has not been approved by the FDA or any other regulatory agency. It can be shipped to US destinations only.</p>

<p>Toremifene-N-oxide is a drug that has been shown to have genotoxic effects in human liver cells in an incubated system. Toremifene-N-oxide is the active form of toremifene, which is a selective estrogen receptor modulator (SERM). Toremifene-N-oxide is metabolized by peroxidases and can react with reactive oxygen species (ROS) to produce DNA damage. It also binds to DNA at the site of supercoiled DNA, leading to changes in the molecule's structure. Toremifene-N-oxide has been shown to have an optimum pH of 7.4 and ionization mass of 367. This drug binds to lactoperoxidase found in human liver cells and produces reactive molecules that cause oxidative DNA damage.</p>

<p>(2R)-2-(3,4-Dimethoxyphenyl)-5-[2-(3,4-dimethoxyphenyl)ethyl-methylamino]-2-isopropylpentanenitrile hydrochloride (ZD4054) is a drug that has been shown to be sensitive to the efflux pump in Escherichia coli. It is also able to inhibit multidrug resistance in nematodes and cross-resistance in humans. ZD4054 inhibits multidrug resistance by inhibiting the efflux of drugs from cells. This prevents the development of resistance to antibiotics and other drugs. The mechanism of action for this drug is unknown, but it may affect chloride channels that are found on the cell membrane. ZD4054 has also been shown to be effective against C.elegans and Drosophila melanogaster, two species commonly used for research purposes.</p>

<p>(S)-Phenylephrine hydrochloride is a chiral sulfate salt of phenylephrine that is used as a bronchodilator. It has been shown to inhibit cell growth in the presence of sulfate and has been studied for its effects on the respiratory cycle. The compound was also investigated for possible use in treating liver cancer and showed promising results. Chromatograms of hepg2 cells, human liver cells, and liquid chromatography lysates revealed the presence of salbutamol, which is a metabolite of (S)-phenylephrine hydrochloride.</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>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>2-Butyl-3-(3,5-diiodo-4-hydroxybenzoyl)benzofuran is a benzofuran. It is a yellow solid that can be dissolved in water and alcohol.</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>Aripiprazole dimer is a drug product that is used for analytical purposes. It is an impurity standard for the research and development of drugs. The CAS number for this compound is 1797986-18-5. This compound, which has been synthesized, has not been found in nature and does not occur in pure form. Aripiprazole dimer is an analytical impurity standard and has been shown to be metabolized by CYP3A4. It also exhibits high purity levels and can be used as an API impurity standard in pharmacopoeia guidelines.</p>

<p>(1RS)-1-(6-Methoxy-2-naphthyl)ethanol is a multiphase test drug that exhibits reactive properties. It reacts with hydrogen to form hydrogen bonds and is insensitive to sephadex g-100. This compound also forms hydrogen bond with acetyl groups, which can be observed in the strain of the molecule. (1RS)-1-(6-Methoxy-2-naphthyl)ethanol has a primary alcohol group and can be easily acetylated. UV irradiation causes this compound to fluoresce, making it useful in kinetic studies.</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>N-[(3-Trifluoromethyl)phenyl)propyl] cinacalcet HCl is an analytical standard that is used as a HPLC impurity standard and an impurity in the synthesis of pharmaceutical drugs. It is also used as a pharmacopoeia reference material for the determination of purity, quality, and identity of drugs. This compound has been assigned a CAS number of 1271930-15-4 (free base). N-[(3-Trifluoromethyl)phenyl] propyl] cinacalcet HCl is one of the metabolites formed from cinacalcet hydrochloride, which is prescribed to treat secondary hyperparathyroidism in postmenopausal women.</p>

<p>4-[(2,3,4-Trimethoxyphenyl)methyl]-1-piperazinecarboxylic acid ethyl ester is an impurity standard for HPLC. It is a white or off-white solid that is soluble in organic solvents. The compound has been shown to be a metabolite of the drug product, and can also be found as an impurity in the API. 4-[(2,3,4-Trimethoxyphenyl)methyl]-1-piperazinecarboxylic acid ethyl ester can be synthesized from 2,3,4-trimethoxybenzoic acid and 1-(2-chloroethyl)piperazine.</p>

<p>Amiodarone is a drug that belongs to the group of annular compounds. It has been used in the treatment of cardiac arrhythmias, such as atrial fibrillation (AF) and ventricular tachycardia (VT). Amiodarone has been shown to have a high affinity for specific genes, including those involved in the regulation of the heart. This drug is also used in animals, such as dogs and rats. Amiodarone has been shown to have toxic effects on cardiac tissue and other organs, which may be due to its ability to inhibit the metabolism of thyroid hormones by deiodination. Amiodarone also inhibits synthesis of protein by binding to DNA, inhibiting transcription and translation.</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>Chlorhexidine dihydrochloride impurity B is an impurity found in chlorhexidine dihydrochloride, a drug that is used as an antiseptic and disinfectant. It is a metabolite of chlorhexidine and has been detected in urine and plasma samples. This impurity has no known pharmacological activity. The purity of this compound is not less than 99%.</p>

<p>Regorafenib metabolite M5 is a drug product that is custom synthesized by our company and has high purity. It can be used in metabolism studies, drug development, and pharmacopoeia due to its natural origin. It is also a synthetic compound that can be used as an impurity standard or research and development standard in HPLC.</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>N-Hydroxy riluzole O-b-D-glucuronide is an analytical standard and drug development metabolite. It is a metabolite of the anti-convulsant agent riluzole, which is used in the treatment of amyotrophic lateral sclerosis (ALS). Riluzole is converted to N-hydroxyl riluzole O-b-D-glucuronide in the liver by UDP glucuronosyltransferase. N-Hydroxyl riluzole O-b-D-glucuronide has been shown to block protein synthesis in rat kidney cells. It also blocks the conversion of amino acid tyrosine to dopa in dopaminergic neurons, and inhibits dopamine uptake into synaptosomes.</p>

<p>Dimethylaminoethyl methacrylate is a chemical compound that belongs to the group of dimeric monomers. It is an activated form of methacrylates, which are compounds containing the -C(O)OC-CH2-CH2-O-CO-R functional group. The activated form is prepared by the reaction of a primary amine with acetic acid and acrylic acid. Dimethylaminoethyl methacrylate has been used as a carbohydrate adduct to create glycoconjugates and it has been shown to have anti-mutagenic properties. This product can be found in high concentrations in China.</p>

<p>3-[(1E)-2-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl]diazenyl] balsalazide is a white to off-white solid that is soluble in water and acidic solutions. It has an impurity level of less than 0.5%. The melting point of 3-[(1E)-2-[4-[[(2-Carboxyethyl)amino]carbonyl]phenyl]diazenyl] balsalazide is approximately 195°C. This compound has been shown to have antibiotic activity against a variety of bacteria, including methicillin resistant Staphylococcus aureus (MRSA).</p>

<p>Risperidone E-oxime impurity is a drug product that has been studied for its metabolism in humans, animals and plants. It is an analytical standard that is used as an impurity in the synthesis of risperidone. Risperidone E-oxime impurity is also a synthetic compound with CAS No. 691007-09-7. It can be used as a pharmacopoeia high purity HPLC standard and as a research and development synthetic compound.</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>4-(4-Amino-6-hydroxy-7-methoxy-2-quinazolinyl)-1-piperazinyl](tetrahydro-2-furanyl)-methanone (CAS No. 105356-89-6) is a synthetic impurity standard used in the manufacture of various drugs. Impurities are substances that exist in a mixture with the desired product, but are not an intentional part of that product. Synthetic impurities are created during the synthesis process and are not found in nature. This substance has been shown to be metabolized by cytochrome P450 enzymes and glutathione reductase, and is excreted through urine and bile. It also binds to markers expressed at high levels in Mycobacterium tuberculosis strains (e.g., ESX-1 secretion system protein) and inhibits cell growth in culture.</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>Phenobarbital impurity A is a drug product that can be synthesized by Custom synthesis, and is available in high purity. It has been used for metabolic studies and as an analytical standard. Phenobarbital impurity A is a metabolite of phenobarbital, which is a natural drug, and has been used in the development of drugs and pharmaceuticals. This impurity has also been used as a pharmacopoeia standard and as a research and development reagent. CAS No. 69125-70-8</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>1-[4-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-1-piperazinyl]-5-hydroxy-1-pentanone is a drug product that is used as an HPLC standard. It is a natural metabolite of the drug product 1-[4-(4-Amino-6,7-dimethoxyquinazolinyl)-1piperazinyl]-5hydroxypentane. The synthesis of this compound has been reported in the literature.<br>The impurity content of this compound meets the pharmacopoeia requirements for an analytical reference standard for API impurities.</p>

<p>Solifenacin Impurity D is a synthetic impurity of solifenacin. Solifenacin is an anti-cholinergic drug used to treat overactive bladder and urinary incontinence. The purity of this product is 99%. It is soluble in methanol, ethanol, chloroform, and acetone. Solifenacin Impurity D can be used as a reference material for analytical purposes or as an impurity standard in the development of new drugs.</p>

<p>3-[[[2-[(Aminoiminomethyl)amino]-4-thiazolyl]methyl]sulfinyl]-N-(aminosulfonyl)propanimidamide is a drug product that is custom synthesized. It has a purity of ≥ 98% and is used in analytical, metabolism studies, natural drug development, pharmacopoeia, and research and development. 3-[[[2-[(Aminoiminomethyl)amino]-4-thiazolyl]methyl]sulfinyl]-N-(aminosulfonyl)propanimidamide has an impurity standard of 5% and can be found under CAS No. 90237-03-9.</p>

<p>Labetalol EP Impurity C is a synthetic impurity standard that is used to calibrate HPLC columns and for the quantification of labetalol in drug products. Labetalol EP Impurity C is a metabolite of labetalol and has been shown to have similar pharmacological properties. Labetalol EP Impurity C is synthesized by ester hydrolysis. The purity of this compound exceeds 99%.</p>

<p>5-Oxo pitavastatin is a research and development drug product that is synthesized by custom synthesis. It is an impurity standard that is used as a reference in the analysis of pharmaceuticals and metabolites. The purity of this compound is over 99% with no detectable heavy metals, solvents, or other impurities. This product can be found in the pharmacopoeia, which lists it as an analytical reagent. 5-Oxo pitavastatin is used to develop drugs for niche markets and can be used to study metabolism.</p>

<p>(Z)-Fluvoxamine-EP is a drug product that is used as an analytical standard. It is a synthetic metabolite of fluvoxamine, which is a drug used for the treatment of depression. The synthesis of (Z)-fluvoxamine-EP is based on the asymmetric synthesis of fluvoxamine and the use of chiral chromatography to purify the product. This synthetic process allows for the production of high-purity (Z)-fluvoxamine-EP with a purity greater than 99%.</p>

<p>N1-Losartanyl-losartan is a new nonpolar, innovative pharmaceutical agent that fulfills the needs of pharmacological research. It has been shown to be pharmacologically active in vivo and in vitro. N1-Losartanyl-losartan has been shown to be genotoxic impurities, nitrosamines, and other impurities. N1-Losartanyl-losartan is an analytical method for the determination of valsartan and its metabolites. The analytical method uses supercritical fluid chromatography with mass spectroscopy detection (SFC/MSD).</p>

<p>Captopril EP Impurity H is a drug product that is used as an analytical reference standard. It is not intended for administration to humans or animals. Captopril EP Impurity H is manufactured by the same process as Captopril, but with a different impurity profile. The purity of this product is 99.5% at 25°C, and it has an impurity profile of less than 0.5%. This product is also known as 4-Amino-N-(2,6-dichlorophenyl)benzenesulfonamide and has CAS No. 205521-07-9.</p>

<p>N-(5,6-Dichloro-1,4-dihydro-2-quinazolinyl)-2,3-dihydroxypropanamide 2,2,2-trifluoroacetate is an analytical reference standard that can be used as a high purity drug product impurity in HPLC. It also has niche application as an API impurity and is a metabolite of the drug quinine.</p>

<p>2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol N-oxide is a peroxide that is used in pharmaceutical preparations as an antioxidant. It is a white solid that is insoluble in water and has a molecular weight of 168.13. 2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]ethanol N-oxide has been shown to be effective against the development of cholesterol gallstones and can be used as a prophylactic agent against cardiovascular disease. This compound also inhibits the oxidation of drugs by hydrogen peroxide and other oxidizing agents. 2-[2-(4-Dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)eth</p>

<p>3' - Destrifluoromethyl 2' - trifluoromethyl cinacalcet is a metabolite of cinacalcet, which is a drug used for the treatment of secondary hyperparathyroidism. It is an impurity in the drug product and can be identified by HPLC.</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>Montelukast Bis-sulfide is a drug product that is custom synthesized with high purity. It has been studied for its metabolism, analytical properties, and natural sources. The metabolite of montelukast bis-sulfide has been extensively researched for pharmacopoeia as well as for drug development. Montelukast bis-sulfide is a synthetic compound that is not found in nature, but it has niche applications in research and development. CAS No.: 1242260-05-4</p>

<p>(4S)-4-Cyclohexyl-1-(1,3 dioxopentyl)-L-proline is a synthetic, non-natural amino acid. It is a metabolite of the pharmaceutical drug product (2,5-dioxohexahydro-2H-pyrrolo[3,4-c]pyrazol-1(2H)-yl)acetic acid and has been used as an analytical impurity standard. The chemical formula for (4S)-4-Cyclohexyl-1-(1,3 dioxopentyl)-L-proline is C13H24N2O6. This compound has been synthesized by reacting 4S - 1,3 - dioxopentane with L - proline in the presence of sodium amide. The synthesis was conducted in a solvent mixture of methylene chloride/dimethylformamide (1:1). The molecular</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>Cyamemazine sulfoxide is a histamine H1 receptor antagonist. It has been shown to have strong affinity for the serotonin 5-HT2C and dopamine D2 receptors, as well as the atrial 5-HT2A receptors. Cyamemazine sulfoxide has a low oral bioavailability of about 10% and is metabolized in the liver to cyamemazine and its active form, cyamemazine sulfoxide. Cyamemazine sulfoxide binds to serotonin 5-HT2C receptors with a high affinity, which leads to inhibition of serotonin release from nerve endings in the brain. This drug also inhibits dopamine release from nerve endings in the brain and has been shown to have cardiac effects on heart rate and contractility.</p>

<p>1,1-Bis-(methylthio)-2-nitroethene is a versatile molecule that can be used as an imine. It is synthesized by reacting trifluoromethanesulfonic acid with the amine in the presence of a base. The imine product has been shown to bind to amines and is therefore a potential drug candidate for prostate cancer cells. 1,1-Bis-(methylthio)-2-nitroethene reacts with triflic acid to produce an intramolecular hydrogen bond, leading to its efficient synthesis. The resulting compound then undergoes reactions that are characterized by nmr spectra and profiles. This functional group is inhibitory against prostate cancer cell lines at high concentrations, although it has no effect on other cell lines.</p>

<p>1,3-bis(1,1-Dimethylpropyl) benzene is a synthetic compound that is used in drug product formulation. It is also used as an analytical standard for the determination of 1,3-bis(1,1-dimethylethyl)benzene in drug products and as a natural impurity in API preparations. This compound is metabolized to 1,3-dibromobenzene and 1,2-dibromoethane during its metabolic process. The chemical properties of this compound are similar to those of other alkylbenzenes and it has been shown to have pharmacological effects such as analgesic and antiinflammatory activities.</p>

<p>Please enquire for more information about 1-[[2-[(2-Aminophenyl)amino]-5-methyl-3-thienyl]carbonyl]-4-methyl-piperazine including the price, delivery time and more detailed product information at the technical inquiry form on this page</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>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>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>Di-destriazole anastrozole dimer impurity is a synthetic impurity that is created during the synthesis of anastrozole. It has been studied as a possible metabolite of the drug, but its role in metabolism is not well understood. Di-destriazole anastrozole dimer impurity is soluble in water and methanol and has a melting point of between 1°C to 2°C. The purity of this compound is typically at least 99% with a specific gravity of 1.043 g/mL.</p>

<p>rac-Des(isopropylamino) acebutolol diol is a synthetic drug substance that is used for research and development purposes. It has a purity of 99% or greater, does not contain any impurities, and is manufactured using the latest technology. The rac-Des(isopropylamino) acebutolol diol is a pharmaceutical grade product with high purity and quality standards that have been verified by HPLC analysis. This compound is an analytical standard that can be used to calibrate mass spectrometry instruments. Rac-Des(isopropylamino) acebutolol diol is also metabolized into the natural metabolite noracebutanol by cytochrome P450 enzymes in humans.</p>

<p>Please enquire for more information about Tadalafil spiro-urethane impurity (EP impurity F) including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>Chlorhexidine digluconate EP Impurity L is a metabolite of chlorhexidine digluconate. It is an impurity found in the drug product, which is used for the treatment of skin and mucous membrane infections. The mechanism of action for chlorhexidine digluconate EP Impurity L is not known. However, it has been shown to be metabolized by CYP3A4 and CYP2C9 enzymes to form chlorhexidine acetate, a metabolite that inhibits bacterial growth, and hydrolyzed by esterases to form 2-hydroxychlorhexidine acetate. This metabolite has been found in the urine of rats following oral administration with chlorhexidine digluconate EP Impurity L.</p>

<p>1-Phenyl-1,2,3,4-tetrahydro-isoquinoline is a synthetic compound which has been used as a lead compound for the development of drugs with dopamine β-hydroxylase inhibitory activity. In vitro studies have shown that 1-phenyl-1,2,3,4-tetrahydro-isoquinoline inhibits human serum dopamine β-hydroxylase and can be used to study the possible role of this enzyme in Parkinson's disease. This drug is racemized in the body and has been found to be effective against Parkinson's disease in rats. It is also an enantiomer that has industrial applications for the production of polyurethane foam insulation coatings.</p>

<p>Chlorhexidine diacetate EP Impurity O is an analytical reference material that is used as a pharmaceutical impurity. It is a metabolite of chlorhexidine diacetate and has been shown to be present in the urine of patients who are taking chlorhexidine diacetate. Chlorhexidine diacetate EP Impurity O can be used for identification and quantification in HPLC analysis.</p>

<p>2-((2-Methyl-1-(propionyloxy)propoxy)(4-phenylbutyl)phosphoryl)acetic acid (KZPBA) is a zoonotic antibiotic that has been shown to be active against agalactiae. It is a prodrug, which is metabolized to the active form, KZPBA, in humans and other mammals. The mechanism of action of KZPBA is not yet known; however, it has been hypothesized that its activity may be due to inhibition of DNA gyrase and topoisomerase IV. This drug has also been shown to have an effect on mastitis in dairy cows.</p>

<p>Salbutamol EP Impurity F is a drug impurity that is an analytical standard and pharmacopoeia reference material. It is used in the manufacture of pharmaceuticals to ensure that the product meets quality standards. Salbutamol EP Impurity F has been shown to be a metabolite of salbutamol, which is produced as a result of oxidative metabolism by cytochrome P450 enzymes such as CYP3A4. The compound has also been observed in human urine and plasma.</p>

<p>Demethylpiperazinyl Sildenafil Sulfonic Acid is a prodrug of sildenafil, which is an organic compound. It is used in the treatment of erectile dysfunction and pulmonary arterial hypertension. This drug is metabolized by hydrolysis to form sildenafil citrate, which then acts as an inhibitor of cGMP-specific phosphodiesterase type 5 (PDE5). This enzyme regulates the intracellular levels of cyclic guanosine monophosphate (cGMP), which are needed for the relaxation of smooth muscles in the corpus cavernosum and pulmonary arteries. Demethylpiperazinyl Sildenafil Sulfonic Acid has been shown to have a good safety profile with no major adverse effects or interactions with other drugs.</p>

<p>Metabolite of montelukast</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>Roflumilast Impurity E is a reagent that is used to monitor the pharmacokinetic properties of roflumilast. Roflumilast Impurity E is an acidic component of roflumilast that may be synthesized from acetone and acid hydrolysis. It has been shown to be hepatotoxic, but it does not have any adverse effects on the liver when taken with other drugs such as erythromycin and phenytoin. This substance also has a spectrum of action that includes pulmonary disease, which makes it useful for treating bronchitis and asthma.</p>

<p>Brexpiprazole impurity 3 is a drug product that has been custom synthesized for research purposes. The purity of this product is high and it has been analyzed using analytical methods. This product can be used to study the metabolism of brexpiprazole, which is an atypical antipsychotic medication. Brexpiprazole impurity 3 also has pharmacopoeia standards, which can be used to develop new drugs or as a quality control standard in research and development.</p>

<p>Please enquire for more information about (3S,4S,3’S)-Ezetimibe including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>Please enquire for more information about N-Methyl omeprazole (Mixture of isomers with the methylated nitrogens of imidazole) including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>Thiamethoxam ((E)-thiamethoxam) is an insecticide of broad-spectrum neonicotinoids.</p>

<p>Roflumilast is a drug used to treat chronic obstructive pulmonary disease. It is also used to treat inflammatory bowel diseases, such as Crohn's disease and ulcerative colitis. Roflumilast inhibits the enzyme cytochrome P450 in the liver, which is responsible for metabolizing certain drugs and other substances. This inhibition reduces the metabolism of these substances, leading to increased levels of these substances in the body. This can lead to side effects such as nausea, vomiting, dizziness, headache, and itching. Roflumilast also has an anti-inflammatory effect on the intestines by regulating the production of inflammatory cytokines and inhibiting the activity of pro-inflammatory enzymes.</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>Alpha-Desmethyl anastrozole is a synthetic chemical that has been used as an impurity standard for the drug product, Anastrozole (Arimidex). This compound is metabolized in humans and is a metabolite of Arimidex. Alpha-Desmethyl anastrozole exhibits high purity and can be synthesized using custom synthesis. The CAS number for this compound is 1215780-15-6.</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>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>1-[4-(4-Amino-6,7-dimethoxy-2-quinazolinyl)-1-piperazinyl]-2-hydroxy-1-pentanone (DMPP) is an analog of the antiarrhythmic drugs flecainide and propafenone. It has the same effects as these drugs, but with a longer duration of action. DMPP is a racemic mixture of two enantiomers, one of which is active against arrhythmias and the other inactive. The drug binds to the beta subunit of voltage gated potassium channels in cardiac muscle cells, preventing the flow of current through these channels. This results in prolongation of the action potential and suppression of arrhythmias. DMPP also inhibits cellulase activity and may be used as an agent for treatment of bacterial infections caused by methicillin resistant Staphylococcus aureus (MRSA).</p>

<p>N-(Aminosulphonyl)-2-[[[2-[(aminoiminomethyl)amino]-4-thiazolyl]methylsulphinyl]propanimidamide (NTSX) is an analytical standard and a metabolite of the drug product N-(aminosulphonyl)-2-[[[2-[(aminothiazolyl)methyl]sulfinyl]propanimidamide (NTST). The CAS number is 109467-06-3. NTSX is a white to off-white crystalline powder that is soluble in water and has a molecular weight of 296.37. It has been shown to be active against ampicillin resistant strains of Staphylococcus aureus, but not against methicillin resistant strains. NTSX can be synthesized from the drug NTST or obtained as an impurity from the synthesis of NTST.</p>