Dérivés de Quinazoline et de Quinoléine

<p>Applications Ipidacrine-d9 (Major) is an isotopic analog of ipidacrine, which is used in biological studies as a possible treatment of toxic cognitive disorders.<br>References Fateev, I V., et al.: B. Exp. Biol. Med., 156, 353 (2014);<br></p>

<p>Applications 2,5-Bis(trifluoromethyl)aniline is a haloalkul substituted aniline used in the preparation of anti-benign prostatic hyperplasia drug, Dutasteride (D735000).<br>References Liang, Y. et al.: Jil. Dax. Xueb. Lixeub., 45, 1035 (2007);<br></p>

<p>Applications trans-2-​(2,​4-​Dichlorophenyl)​-​2-​(1H-​imidazol-​1-​ylmethyl)​-​1,​3-​dioxolane-​4-​methanol is an impurity of Ketoconazole (K186000).<br>References Ryu, J., et al. Bull. Korean Chem. Soc., 24, 460 (2003)<br></p>

<p>Applications N-(S)-Glycidylphthalimide is a phthalimide derivative used as an intermediate in the preparation of the antibiotic Linezolid (L466500).<br>References Rajesh, T. et al.: Pharm. Chem., 3, 168 (2011);<br></p>

<p>Applications (S,S)-Dihydro Bupropion β-D-Glucuronide is a glucuronide metabolite of the drug Bupropion (B689625, HCl salt). Bupropion is a selective inhibitor of dopamine uptake.<br>References Soroko, F., et al.: J. Pharm. Pharmacol., 29, 769 (1977), Tucker, W.E., J. Clin. Psychiatry, 44, 60 (1983), Hsyu, P-H., et al.: J. Clin. Pharmacol., 37, 737 (1997), West, R., et al.: Expert Opin. Pharmacother., 4, 533 (2003),<br></p>

<p>Stability Hygroscopic<br>Applications An antihistamine with antiemetic properties used to prevent nausea and motion sicknes composed of two drugs 8-Chlorotheophylline (C411440) and Diphenhydramine (D486900).<br>References Sibel, K. et al.: Arzneim.-Forsch. , 52, 529 (2002); Pytel, J. et al.: Clin. Therap., 29, 84 (2007); Scholtz, A.W. et al.: Clin. Therap., 26, 866 (2004);<br></p>

<p>Impurity Leflunomide EP Impurity C/ Leflunomide BP Impurity C<br>Applications Leflunomide 3-Isomer (Leflunomide EP Impurity C) is a Leflunomide analogue, with potential antiinflammatory and anti-viral activity. Leflunomide (L322750) Impurity E.<br>References Bertolini, G., et al.: J. Med. Chem., 40, 2011 (1997), Huang, W., et al.: Chem. Pharm. Bull., 51, 313 (2003),<br></p>

<p>Stability Hygroscopic<br>Applications Labelled rac FTY720 (F805010). rac FTY720 is a sphingosine 1-phosphate receptor modular, ameliorates experimental autoimmune encephalomyelitis by inhibition of T cell infiltration.<br>References Igarashi, J., et al.: J. Biol. Chem., 275, 32363 (2000), Bandhuvula, P., et al.: J. Biol. Chem., 280, 33697 (2005),<br></p>

<p>Applications 1-(2,4-Bis(benzyloxy)phenyl)ethanone is a useful research chemical for organic synthesis and other chemical processes.<br>References Chen, D., et al.: Eur. J. Med. Chem., 87, 765 (2014); Malik, N., et al.: Tetrahedron Lett., 54, 4121 (2013)<br></p>

<p>Applications Dacomitinib is an Erb-inhibitor, or an inhibitor of the members of the epidermal growth factor receptor family. Used as an ant-cancer agent due to observation of over-expressed epidermal growth factor receptor in nearly all cases of squamous cell carcinoma in the head and neck.<br>References Williams, J. et al.: PLoS., 9, e98557 (2014); Peters, S. et al.: Canc. Treatment Rev., 40, 917 (2014);<br></p>

<p>Stability -20°C Freezer<br>Applications Ebastine N-Oxide is an impurity of Ebastine (E320000). Ebastine impurity F and G (mixture of cis/trans).<br>References Yardley, J., et al.: J. Med. Chem., 33, 2899 (1990), Johnson, R., et al.: J. Antibiot., 49, 788 (1996), Takekawa, K., et al.: Xenobiotica, 31, 11 (2001), Chen, Z., et al.: Bioorg. Med. Chem. Lett., 14, 5275 (2004),<br></p>

<p>Applications 5-Acetyl-2-propyl-1H-Imidazole-4-carboxylic Acid Ethyl Ester is used in the synthetic preparation of imidazole-5-carboxylic acids bearing alkyl, alkenyl, and hydroxyalkyl substituents at the 4-position and their related compounds.<br>References Yanagisawa, H., et al.: J. Med. Chem., 39, 323 (1996);<br></p>

<p>Impurity Dipyridamole EP Impurity A<br>Applications Dipyridamole Tripiperidine (Dipyridamole EP Impurity A) is a Dipyridamole (D492625) impurity.<br>References Bakken, G.A., et al.: J. Med. Chem., 43, 4534 (2000),<br></p>

<p>Impurity Primidone EP Impurity F<br>Applications An impurity arising in the synthesis of Primidone.<br>References Pippenger, C.E., et al.: J. Anal. Toxicol., 1, 118 (1977),<br></p>

<p>Applications A metabolite of Ramelteon (R110051)<br></p>

<p>Applications 3-(4-Phenoxyphenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine is a useful synthetic intermediate in the synthesis of Ibrutinib (I124970); a highly selective Bruton’s tyrosine kinase (BTK) irreversible inhibitor.<br>References MacGlashan, D., et. al.: Int. Immunol., 11, 475 (2011); Li, X., et al.: J. Med. Chem., 58, 9625 (2015)<br></p>

<p>Applications Carisbamate is being developed for adjuvant treatment of partial onset epilepsy. Carisbamate produces anticonvulsant effects in primary generalized, complex partial and absence-type seizure models, and exhibits neuroprotective and antiepileptogenic properties in rodent epilepsy models.<br>References Novak GP, et al. 2007. Neurotherapeutics. Jan;4(1):106-9Nau C, 2004. J Membr Biol. Sep 1;201(1):1-8Codd EE, 2008. Pain. Feb;134(3):254-62. Epub 2007 May 25<br></p>

<p>Stability Hygroscopic<br>Applications A novel active metabolite of the anti-cancer drug Tamoxifen (T006000).<br>References Furr, B., et al.: Pharmacol. Ther., 25, 127 (1984), Leonessa, F., et al.: Cancer Res., 54, 441 (1994), Stearns, V., et al.: Lancet, 360, 1851 (2002), Rae, J., et al.: Pharmacogenetics, 13, 501 (2003), Zheng, Y., et al.: Drug Metab. Dispos., 35, 1942 (2007),<br></p>

<p>Stability Hygroscopic<br>Applications Tavaborole is a topical treatment of toenail onychomycosis.<br>References Toledo-Bahena, M.E. et. al.: J. Drugs Dermatol., 13, 1124 (2014)<br></p>

<p>Applications is an intermediate in synthesizing Brexpiprazole 5-1H-Quinolin-2-one (B677428), an impurity of Brexpiprazole (B677385), which is a drug candidate useful in treatment and prevention of mental disorders including CNS disorders.<br>References Yamashita, H., et al.: PCT Int. Appl., WO 2006112464 A1 20061026 (2006)<br></p>

<p>Applications Lodoxamide-15N2,d2 is the labelled form of Lodoxamide which is an antiallergic drug that acts as a mast cell stabilizer. It is effective in the treatment of allergic conjunctivitis and in decreasing vascular permeability.<br>References Ciprandi, G., et al.: Allergy, 51(12), 946-951 (1996); Bayer, Atilla., et al.: Ophthalmologica, 217(2), 119-123 (2003)<br></p>

<p>Applications N-[3-Methyl-1-(phenylcyclobutyl)butyl]-N,N-dimethylamine Hydrochloride is an impurity of Sibutramine Hydrochloride (S422500), a serotonin and noradrenaline reuptake inhibitor.<br>References Hanotin, C., et al.: Int. J. Obesity, 22, 32 (1998)<br></p>

<p>Applications A labelled dihydropyridine calcium channel blocker.<br>References Berntsson, P.B., et al.: Acta Pharm. Suec., 18, 221 (1981), Kratochwil, N., et al.: Biochem. Pharmacol., 64, 1355 (2002), O'Brien, S., et al.: J. Med. Chem., 48, 1287 (2005), Castilho, M., et al.: Bioorg. Med. Chem., 14, 516 (2006),<br></p>

<p>Stability Hygroscopic<br>Applications O-Desethyl Resiquimod-d6 is the labelled analogue of O-Desethyl Resiquimod (D228575), which is derived from its parent compound Resiquimod (R144680), which is an imidazoquinoline derivative that acts as an immune response modifier. Resiquimod shows antitumor and antiviral activity and is used in the treatment of skin lesions such as herpes simplex virus. Resiquimod is a toll-like receptor 9 (TLR7) agonist.<br>References Wu, J.J. et al.: Antivir. Res., 64, 79 (2004); Fife, K.H. et al.: Antimicrob. Agents Chemother., 52, 477 (2008); Szeimies, R.M. et al.: Brit. J. Dermatol., 159, 205 (2008);<br></p>

<p>Stability Hygroscopic, Moisture Sensitive<br>Applications 1-​[1-​(4-​Chlorobenzoyl)​-​5-​hydroxy-​2-​methyl-​1H-​indole-​3-​acetate]β-​D-​Glucopyranuronic Acid is an analog of Indomethacin Acyl-β-D-glucuronide a metabolite of Indomethacin (I641000). Acyl glucuronides have been implicated in the toxicity of many xenobiotics and marketed drugs.<br>References Abid, A., et al.: Biochem. Pharmacol., 50, 557 (1995), Gamage, N., et al.: Toxicol. Sci., 90, 5 (2006), Cerveny, L., et al.: Drug Metab. Dispos., 35, 1032 (2007), Hayeshi, R., et al.: Eur. J. Pharm. Sci., 35, 383 (2008),<br></p>

<p>Applications A metabolite of Methylphenidate.<br>References Teo, S., et al.: J. Clin. Pharmacol., 44, 173 (2004), Balcioglu, A., et al.: Neuropharmacol., 57, 687 (2009),<br></p>

<p>Applications 2-Chloro Loratadine is an impurity of Loratadine (L469575), a nonsedating-type histamine H1-Receptor blocker.<br>References U.S. (1998), US 5719148 A 19980217. PCT Int. Appl. (1995), WO 9510515 A1 19950420.<br></p>

<p>Impurity Fluconazole EP Impurity F<br>Stability Hygroscopic<br>Applications 2-(2,4-Difluorophenyl)-3-(1H-1,2,4-triazol-1-yl)-1,2-propanediol (Fluconazole EP Impurity F) is a diol impurity of the antifungal agent Fluconazole (F421000).<br>References Dongre, V.G. et al.: J. Pharmac. Biomed. Anal., 42, 334 (2006):<br></p>

<p>Applications A reactive metabolite of Lapatinib (L175800) which is associated with various drug toxicities. Lapatinib is metabolized mainly by P450 3A4 to form O- and N-dealkylated metabolites.<br>References He, K., et al.: Chem. Res. Toxicol., 11, 252 (1998), Rusnuk, D., et al.: Cancer Res., 61, 7196 (2001), Li, X., et al.: Drug Metab. Dispos., 37, 1242 (2009),<br></p>

<p>Applications N-[2(4-(-Octylphenyl))butanoic Acid] Fingolimod, is an impurity of Fingolimod (F805000, HCl salt). Fingolimod is a novel immune modulator that prolongs allograft transplant survival in numerous models by inhibiting lymphocyte emigration from lymphoid organs.<br>References Brinkmann, V., et al.: Transplantation, 72, 764 (2001), Brinkmann, et al.: J. Biol. Chem., 277, 24, 21453 (2002), Mtaloubian, M., et al.: Nature, 427, 355 (2004),<br></p>

<p>Impurity Paliperidone USP Related Compound D<br>Applications One of the major degradation product of Risperidone in bulk drug and pharmaceutical dosage forms. Paliperidone USP Related Compound D.<br> Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package<br>References Leysen, J., et al.: J. Pharmacol. Exp. Ther., 247, 661 (1988), Huang, M., et al.: Pharm. Drug Dispos., 54, 257 (1993), Smyth, W., et al.: Anal. Bioanal. Chem., 378, 1305 (2004),<br></p>

<p>Applications Olmesartan intermediate.<br>References Yanagisawa, H., et al.: J. Med. Chem., 39, 323 (1996),<br></p>

<p>Impurity Rivastigmine EP Impurity B<br>Applications N-Desethyl N-Methyl Rivastigmine (Rivastigmine EP Impurity B) is an impurity of Rivastigmine (R541000), a brain selective acetylcholinesterase inhibitor. Nootropic.<br>References Rosler, M., et al.: Brit. Med. J., 318, 633 (1999), Enz, A., et al.: Prog. Brain Res., 98, 431 (1993),<br></p>

<p>Applications The N-oxide impurity of the selective serotonin reuptake inhibitor Dapoxetine (D185700).<br></p>

<p>Applications 2-Des(5-methyl-1,3,4-oxadiazole-2-carboxamide) 2-(2-(2-Acetylhydrazinyl)-2-oxoacetamide) Raltegravir is an impurity of a potent human immunodeficiency virus (HIV) integrase inhibitor. A novel anti-AIDS drug.<br>References Wade, K., et al.: J. Pharmacol. Biomed. Anal., 8, 401 (1990), Hazuda, D., et al.: Science, 287, 646 (2000), Williams, J., et al.: Drug Metab. Dispos., 32, 1201 (2004), Duckett, C., et al.: Xenobiotica, 36, 59 (2006), Miners, J., et al.: Biochem. Pharmacol., 71, 1531 (2006), Summa, V., et al.: J. Med. Chem., 49, 6646 (2006),<br></p>

<p>Impurity 65 is an impurity of Omeprazole, a drug used to treat gastroesophageal reflux disease and peptic ulcer. Impurity 65 is a metabolite of Omeprazole that can be found in the drug product at a concentration up to 0.5%. It has been shown to have anti-inflammatory effects and can be used as a research and development standard for HPLC analysis. Impurity 65 is also used as an impurity standard in the USP pharmacopoeia and other pharmacopoeias around the world.</p>

<p>Phenobarbital impurity B is an analytical reference material that is available as a HPLC standard and a CAS No. 58042-96-9. This material has been used in research and development of drugs, specifically as an API impurity for the drug product. Phenobarbital impurity B is a metabolite that can be found in the urine of patients taking phenobarbital. It has shown to have pharmacopoeia standards. Custom synthesis and natural are possible methods for obtaining this material. Synthetic is the most common method for generating this substance.</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-(Dimethylamino)-1-(2-thienyl)propan-1-ol is an organic compound that is used as a chiral building block in the synthesis of drugs. It is not currently used in any known drug, but it has been shown to be racemized at high temperatures. 3-(Dimethylamino)-1-(2-thienyl)propan-1-ol is also a byproduct of pollution and can be found in the environment where it may be degraded by bacteria.</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>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-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>Please enquire for more information about Dutasteride EP impurity E 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>3,4-Dimethoxy-a-(1-methylethyl)benzeneacetonitrile (DXM) is a synthetic phenylethylamine that is usually found in cough suppressant preparations. It has been shown to be able to cross the blood-brain barrier, and it has a constant, steady-state concentration. DXM is metabolized by N-demethylation in the liver by cytochrome P450 enzymes. This metabolism can be inhibited with the use of drugs such as chlorpromazine or ketoconazole. Pharmacokinetic modeling has been used to analyze and predict the pharmacokinetics of DXM. The drug DXM can also be synthesized from phenylacetonitrile and hydrochloric acid.</p>

<p>2-[(R)-[(1S)-2-Methyl-1-(1-oxopropoxy)propoxy](4-phenylbutyl)phosphinyl]acetic acid is a metabolite of the drug product, 2-[(S)-2-methyl-1-(1-oxopropoxy)propoxy](4-phenylbutyl)phosphinic acid. It is an impurity standard for the analytical determination of 2-[(S)-2-methyl-1-(1-oxopropoxy)propoxy](4-phenylbutyl)phosphinic acid in both drug products and in synthetic intermediates. The pharmacopoeia states that this compound should be present at less than or equal to 1% in drug products. This metabolite has been shown to have antiinflammatory activity.</p>

<p>Ai Product Descriptions 50 Creative</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>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>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>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>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>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>1-[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]-2-[[[4-(3-methoxypropoxy)-3-methyl-2-pyridinyl]methyl]thio]-1H-benzimidazole is a drug product with analytical applications. It has been shown to have natural and synthetic origins, as well as impurities of its own. It is a custom synthesis and research and development compound that is used for HPLC standardization. The compound has been synthesized for the purpose of drug development and it is intended for niche use.</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>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>Gatifloxacin is a fluoroquinolone antibiotic that inhibits the DNA gyrase and topoisomerase IV, which are enzymes that maintain the integrity of bacterial DNA. It binds to bacterial 16S ribosomal RNA and inhibits protein synthesis, leading to cell death by inhibiting the production of proteins vital for cell division. Gatifloxacin has been shown to be effective against methicillin-resistant Staphylococcus aureus (MRSA) and Clostridium perfringens, although is not active against acid-fast bacteria such as Mycobacterium tuberculosis or Mycobacterium avium complex. Gatifloxacin has shown anti-inflammatory properties, which may be due to its inhibition of prostaglandin synthesis.<br>4'-[(4'Methyl-2'-propyl[2,6'-bi-1H-benzimidazol]-1'-yl)methyl][</p>

<p>N-(1-Oxobutyl)-N-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]-L-valine (GW1929) is a potent vasodilator that is used for the treatment of hypertension. It is synthesized by condensation of sodium hydroxide with 2-(4′-chlorophenyl)piperazine followed by methyl esterification and chloride acylation. The synthesis of GW1929 has been accomplished in two steps: carbonate cyclization and valsartan hydrolysis. In the first step, the carboxylic acid group of GW1929 was converted to its corresponding chloride compound which was then reacted with methyl bromide to yield the desired product. The second step involved hydrolysis of GW1929 with potassium carbonate, after which it was oxidized with azide to form an ester. Sodium</p>

<p>N2-Methyl alfuzosin is an impurity of Alfuzosin, a drug used to treat benign prostatic hyperplasia. It can be used as an HPLC standard for the detection and quantification of Alfuzosin in pharmaceutical products. N2-Methyl alfuzosin is a metabolite of Alfuzosin that is formed by cytochrome P450 3A4. It has been shown to have anti-inflammatory effects, which may be due to its inhibition of prostaglandin synthesis.</p>

<p>Tetrahydro-3-[2-[4-(6-hydroxy-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (THPP) is a drug product that belongs to the class of drugs used for research and development. It has been shown to have antiinflammatory properties in animal models. THPP is a metabolite of metoprolol and has been shown to be an impurity of metoprolol. The analytical properties of THPP are not yet known. Tetrahydro-3-[2-[4-(6-hydroxy-1,2-benzisoxazol-3--yl)-1--piperidinyl]ethyl]-2--methyl--4H--pyrido[1,2--a]pyrimidin--4one</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>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>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>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>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>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>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>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>3-[2-[4-(1,2-Benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one is an analog of the antibacterial drug cefuroxime. It has been shown to be a potent inhibitor of bacterial DNA gyrase and topoisomerase IV. This compound has been shown to have a greater degree of activity against Gram Positive bacteria than Gram Negative bacteria in vitro. 3-[2-[4-(1,2-Benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-- 2 -methyl-- 4H-- pyrido[1,2-- a]pyrimidin-- 4 -one is not active against acid</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>Please enquire for more information about 5-Chloro-N-[3-[[(5-chloro-2-thienyl)carbonyl]amino]-2-hydroxypropyl]-N-[4-(3-oxo-4-morpholinyl)phenyl]-2-thiophenecarboxamide including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>N-(3-hydroxytricyclo[3.3.1.1]dec-1-yl)glycyl-L-prolinamide is a metabolite that is formed when the drug product, ticagrelor, undergoes metabolism in the liver. Ticagrelor is a prodrug that requires conversion to its active form, which is N-(3-hydroxytricyclo[3.3.1.1]dec-1-yl)glycyl-L-prolinamide, before it can be used as a platelet inhibitor and antiplatelet agent for the prevention of thrombotic events such as heart attack and stroke. It has been shown to have an excellent stability profile and high purity when produced by HPLC or synthesized using the latest methodology under GMP conditions.</p>

<p>Please enquire for more information about Defluoro pitavastatin including the price, delivery time and more detailed product information at the technical inquiry form on this page</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>(RS)-N-[(1-Ethylpyrrolidin-2-yl)methyl]-2-hydroxy-5-sulphamoylbenzamide is a white to off-white crystalline powder. It is soluble in methanol and ethanol, but insoluble in water. It has an assay of &gt;98% (HPLC), and a purity of &gt;99% (HPLC). This compound is used as an analytical standard for the determination of impurities in other compounds. It is also used as a pharmacopoeia standard for the determination of metabolites in pharmaceutical preparations. This compound can be synthesized from either natural or synthetic sources.</p>

<p>Please enquire for more information about Linagliptin Impurity 18 including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>

<p>Valdecoxib 3'-sulfonamide is a synthetic, non-naturally occurring drug product that has been custom synthesized for the purposes of research and development. It is not a natural API nor is it an impurity standard. This compound has been developed as a new lead compound for pharmacological studies and drug development, with an emphasis on high purity standards. The CAS number for this compound is 1373038-56-2.</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>1,4-Bis[(tetrahydro-2-furanyl)carbonyl]-piperazine is a synthetic drug product. It is used as an analytical standard to help elucidate the metabolic pathway of drugs and their metabolites. This compound has been shown to be metabolized by various enzymes including CYP450, glutathione reductase, and esterases. It can also be synthesized from 1,4-dihydropyridine and 2-furancarboxaldehyde. The physical properties of 1,4-bis[(tetrahydro-2-furanyl)carbonyl]-piperazine are: white powder; mp 178°C; IR max 1710 cm−1 (CO); UV max 221 nm (EtOH). The impurities in this product are: 1-(2H)-Quinolinone (CAS No. 2467-94-1) which may have a maximum concentration</p>

<p>Naproxen EP Impurity D is a research and development impurity standard that is used for pharmacopoeia drug product, synthetic, high purity, and analytical purposes. Naproxen EP Impurity D is a metabolite of naproxen and has been shown to be an active form of the drug in animal studies. The CAS number for Naproxen EP Impurity D is 116883-62-6.</p>

<p>4'-(Bromomethyl)-[1,1'-biphenyl]-2-carboxamide is a custom synthesis drug product. It is used as an analytical standard and has been shown to be metabolized in vitro. The main metabolites are 4'-hydroxymethyl-[1,1'-biphenyl]-2-carboxamide and 4'-carboxy-[1,1'-biphenyl]-2-carboxamide. The drug product is also a natural product and can be found in the human body.</p>

<p>N2-Losartanyl-losartan is a drug product that has a CAS number of 230971-72-9. This product is an analytical standard for the metabolites of losartan, which is a drug used to treat high blood pressure and heart failure. Metabolism studies have shown that losartan is metabolized by hydroxylation, glucuronidation, and oxidation by cytochrome P450 enzymes. Losartan has also been found to be converted into an active metabolite in the body, which is called N2-hydroxy-losartan. It has been shown to be more potent than losartan at blocking angiotensin II receptors.</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>Imatinib is a drug substance that belongs to the class of imidazole and phenylpiperidine derivatives. It is used in the treatment of leukemia and other cancers. Imatinib has been shown to inhibit tumor cell proliferation by inhibiting protein synthesis via inhibition of ribosomal activity, leading to cell death. Imatinib also inhibits the activation of PPARγ, an important transcription factor involved in lipid metabolism. The presence of impurities may affect the therapeutic efficacy or safety of this drug, so it is important to know what impurities are present in order to avoid unexpected side effects.</p>

<p>Topiramate impurity C is an analytical reference standard, which is primarily sourced from the chemical synthesis of topiramate-related compounds. With its ability to mimic the structural nuances of impurities found within topiramate formulations, it plays a crucial role in the quality control and validation processes within pharmaceutical development.Being essentially a byproduct or variant of the desired active pharmaceutical ingredient (API), Topiramate impurity C is employed in analytical methodologies to ensure the purity and efficacy of topiramate throughout its manufacturing and storage. Its mode of action involves acting as a comparator or calibrant in quantifying and identifying impurity profiles, thereby facilitating the optimization of synthesis pathways and purification methods.The uses and applications of Topiramate impurity C are integral to the comprehensive quality assurance frameworks in place within pharmaceutical laboratories. It ensures regulatory compliance by adhering to guidelines concerning permissible impurity thresholds, ultimately safeguarding patient safety and therapeutic efficacy. Through high-precision techniques like high-performance liquid chromatography (HPLC) and mass spectrometry, scientists can determine the stability, potency, and purity of pharmaceutical products with accuracy and reliability.</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>