Derivados de Purinas y Pirimidinas

<p>Applications A metabolite of Nitrotyrosine (N597000), which is excreted in the urine.<br>References van der Vliet, A., et al.: J. Biol. Chem., 272, 7617 (1997), Tabrizi-Fard, M., et al.: Drug Metab. Dispos., 27, 429 (1999), Souza, J., et al.: Arch. Biochem. Biophys., 380, 360 (2000),<br></p>

<p>Applications 9-(2-Propenyl)adenine is an N-substituted purine used in the preparation of mesityl dihydroisoxazolyl homo-N-nucleosides.<br>References Thalassitis, A. et al.: Bioorg. Med. Chem. Lett., 19, 6433 (2009); Chiacchio, U. et al.: Tetrahedron, 60, 441 (2004)<br></p>

<p>Applications 6-Methylpurine (cas# 2004-03-7) is a compound useful in organic synthesis.<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></p>

<p>Stability Hygroscopic<br>Applications Precursor in the biosynthesis of Biopterin. First isolated from the pupae of bees.<br>References Kobashi, I., et al.: Agric. Biol. Chem., 35, 47 (1971), Fukushima, S., et al.: J. Biol. Chem., 247, 4549 (1972),<br></p>

<p>Stability Store in freezer<br>Applications A caffeine metabolite.<br>References Regal, K.A., et al.: J. of Chromatography B, 708, 75 (1998)<br></p>

<p>Applications Used in the novel synthesis of biologically active nitro heterocyclic compounds.<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 Pawar, N., et al.: Eur. J. Pharm. Sci., 21, 115 (2004), Badgujar, D., et al.: J. Sci. Ind. Res., 66, 250 (2007),<br></p>

<p>Stability Hygroscopic<br>Applications Methotrexate-d3 Tetraglutamate is the isotope labelled analog of Methotrexate Tetraglutamate (M260730); a metabolite of Methotrexate (M260675) which is a folic acid antagonist, antineoplastic, and antirheumatic.<br>References Freeman, M.V., J. Pharmacol. Exp. Ther., 122, 154 (1958); Weinblass, M.E., et al.: N. Engl. J. Med., 312, 818 (1985)<br></p>

<p>Applications A acyclic phosphonate nucleotide.<br></p>

<p>Applications Ethyl Tosylate (cas# 80-40-0) is a compound useful in organic synthesis.<br></p>

<p>Applications Istradefylline is a selective A(2A) antagonist used in the treatment of Parkinson’s disease.<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 Dungo, R. et al.: Drugs., 73, 875 (2013); Stoessel, A. et al.: J. Med. Chem., 56, 4580 (2013);<br></p>

<p>Applications Tenofovir Phosphate Diammonia Salt is a metabolite of Tenofovir (T018500), an acyclic phosphonate nucleotide analogue; reverse transcriptase inhibitor. Used as an anti-HIV agent. Antiviral.<br>References Michelson, A.M., et al.: Biochim. Biophys. Acta, 91, 1 (1964); Rosenberg, I., et al.: Collect. Czeck. Chem. Commun., 50, 1507 (1985); Shaw, J.-P., et al.: Pharm. Res., 14, 1824 (1997); Wyles, D., et al.: Clin Infect. Dis., 40, 174 (2005),; Peng, J., et al.: J. Clin. Pharmacol., 46, 265 (2006); Seminari, E., et al.: J. Antimicrob. Chemother., 60, 831 (2007)<br></p>

<p>Applications Ondansetron-d3 is a labeled specific serotonin (5-HT3) receptor antagonist. Antiemetic.<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 Kris, M.G., et al.: J. Clin. Oncol., 6, 659 (1988); Faris, P..L., et al.: Lances, 355, 792 (2000)<br></p>

<p>Applications Metabolite of 6-Mercaptopurine, an immunosuppressive drug used to treat leukemia.<br>References Chou, C., et al.: Biochem. Pharmacol., 75, 1601 (2008), Conejo-Garcia, A., et al.: Eur. J. Med. Chem., 43, 1742 (2008), Hawwa, A., et al.: Brit. J. Clin. Pharmacol., 66, 826 (2008), Askanase, A., et al.: J. Rheumatol., 36, 89 (2009),<br></p>

<p>Applications 5-Amino-N1-methyl-1H-imidazole-1,4-dicarboxamide is a metabolite of Temozolomide (T017775); an imidazotetrazine alkylating agent and antineoplastic.<br>References Newlands, E.S., et al.: Cancer Treat. Rev., 23, 35 (1997); Kim, C., et al.: J. Biol. Chem., 274, 1233 (1999); Hait, W., et al.: Cancer Res., 69, 1263 (2009); Wang, Y., et al.: J. Org. Chem., 62, 7288 (1997)<br></p>

<p>Applications A metabolite of Ondansetron.<br>References Colthup, P., et al.: J. Pharm. Sci., 80, 868 (1991), Miyauchi, S., et al.: Pharm. Res.,10, 434 (1993), Ekins, S., et al.: Drug Metab. Dispos., 23, 1274 (1995), Worboys, P., et al.: Xenobiotica, 26, 897 (1996),<br></p>

<p>Applications 1,3-Dimethyluric Acid, is a metabolite of Caffeine (C080100), that is shown to have some of Its similar effects.<br>References Kalow, W., et al.: Clin. Pharmacol. Ther., 53, 503 (1993), Sharma, S., et al.: Cancer Res., 54, 5848 (1994), Sugawara, M., et al.: J. Biol. Chem., 275, 16473 (2000), Takeda, M., et al.: J. Pharmacol. Exp. Ther., 302, 666 (2002),<br></p>

<p>Applications Pirimiphos-methyl is a phosphorothioate used as an insecticide. Pirimiphos-methyl is commonly used for mosquito control as well as control of greenhouse crop pests and stored-product insects.<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 Deighton, J. et al.: Mosq. News, 34, 163 (1974); LaHue, D.W.: J. Econ. Entomol., 68, 236 (1975); Antonious, G.F. et al.: J. Entomol. Sci., 30, 191 (1995):<br></p>

<p>Applications 3-Oxobutanoic Acid Methyl Ester is a chemical reagent used in the synthesis of pharmaceuticals. It participates in the Biginelli reaction, forming molecules including dihydropyrimidinones.<br>References Ranu, B. et al.: J. Org. Chem. 65, 6270 (2000); Lu, J. et al.: Tetrahedron Lett., 41, 9075 (2000); Lu, J. et al.: Synlett., 1, 63 (2000);<br></p>

<p>Applications Intermediate in the production of Thyroxine<br></p>

<p>Applications (S)-Tenofovir is an S-enatiomeric derivative of Tenofovir (T018500). (S)-Tenofovir displays virucidal activity against herpes, visna virus and retrovirus. The S enantiomer of Tenofovir (T018500) is less effective against HIV than their (R)-enantiomeric counterparts.<br>References Balzarini, J. et al: Biochem. Biophys. Res. Comm., 219, 337 (1996); Balzarini, J. et al.: Antimicrob. Agents. Ch., 37, 332 (1993); Thormar, H. et al.: Antimicorb. Agents. Ch., 37, 2540 (1993)<br></p>

<p>Applications Methotrexate-d3 Hexaglutamate is the isotope labelled analog of Methotrexate Hexaglutamate (M260745); a metabolite of Methotrexate (M260675) which is a folic acid antagonist, antineoplastic, and antirheumatic.<br>References Freeman, M.V., J. Pharmacol. Exp. Ther., 122, 154 (1958); Weinblass, M.E., et al.: N. Engl. J. Med., 312, 818 (1985)<br></p>

<p>Applications An aryl hydrazine used in the preparation of various dyes and pharmaceutical compounds. It is used in the investigation of oligosaccharides as well as the structure of photosystem II.<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 Lattova, E. et al.: Meth. Mol. Biol., 534, 65 (2009); Anderson, L.B. et al.: J. Biol. Chem., 275, 4920 (2000);<br></p>

<p>Applications A labelled metabolite of Theophylline.<br>References Chen, Y., et al.: Clin. Exper. Pharmacol. Physiol., 36, 828 (2009), Yu, C., et al.: J. Bacteriol., 191, 4624 (2009), Jetter, A., et al.: Eur. J. Clin. Pharmacol., 65, 411 (2009),<br></p>

<p>Applications Protected Pemetrexed.<br></p>

<p>Applications Isotope labelled analog of Xanthine (X499950), a substance that can be found in animal organs, yeast, patatoes, coffee beans, tea. Xanthine can be used to relax and widen certain breathing passages of the lungs. It is also found that a large number of derivatives that exhibits adenoside receptor antagonist properties.<br>References Mueller, C. et. al: Handbook Exp. Pharmacol. 200,151(2011)<br></p>

<p>Applications Labelled analogue of L-Phenylalanine, an essential amino acid.<br>References Hollunger, G. et al.: Acta Pharmacol. Toxicol., 34, 391 (1974); Bagchi, S.P. et al.: Biochem. Pharmacol., 26, 900 (1977);<br></p>

<p>Applications Febuxostat 2-butyl Isomer is an impurity of Febuxostat (F229000) which is a xanthine oxidase/xanthine dehydrogenase inhibitor.<br>References Osada, Y., et al.: Eur. J. Pharmacol., 241, 183 (1993); Okamoto, K., et al.: J. Biol. Chem., 278, 1848 (2003); Mayer, M.D., et al.: Am. J. Therap., 12, 22 (2005); Tomlinson, B., et al.: Curr. Opin. Invest. Drugs, 6, 1168 (2005)<br></p>

<p>Applications N-(3,4-Dimethoxyphenethyl)formamide is an impurity of Tetrabenazine (T284000), an antipsychotic.<br>References Schwartz, D., et al.: Biochem. Pharmacol., 15, 645 (1966),<br></p>

<p>Applications Labelled nucleoside analog; specific inhibitor of hepatitis B virus (HBV) replication. Antiviral.<br>References Standring, D.N., et al.: Antiviral. Chem. Chemother., 12, 119 (2001), Hernandez-Santiago, B., et al.: Antimicrob. Agents Chemother., 46, 1728 (2002), Lai, C.-L., et al.: Hepatology, 40, 719 (2004), Han, S.-H.B., et al.: Expert Opin. Invest. Drugs, 14, 511 (2005),<br></p>

<p>Applications Allopurinol is a xanthine oxidase inhibitor; decreases uric acid production. Used in treatment of hyperuricemia and chronic gout. Antiurolithic.<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 Benezra, S.A., et al.: Anal. Profiles Drug Subs., 7, 1, (1978); Dalbeth, N., et al.: Rheumatology, 44, 1090 (2005); Dinarello, C., et al.: J. Exp. Med., 201, 1355 (2005);<br></p>

<p>Stability Hygroscopic<br>Applications The indole acetic acid metabolite of Zolmitriptan (Z639000) formed by human hepatocytes.<br>References Wild, M.J. et al.: Xenobiotica, 29, 847 (1999);<br></p>

<p>Applications Caffeine-13C3 is a labelled analogue of Caffeine (C080100), a bitter, white crystalline xanthine alkaloid that acts as a stimulant drug and a reversible acetylcholinesterase inhibitor. Caffeine is found in varying quantities in the seeds, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. In humans, caffeine acts as a central nervous system stimulant, temporarily warding off drowsiness and restoring alertness. Caffeine is a cardiac and respiratory stimulant; diuretic. Caffeine is toxic at sufficiently high doses.A study at Johns Hopkins University indicates that caffeine can improve pattern separation memory.<br>References Zubair, U.M., et al.: Anal. Profiles Drug Subs., 15, 71 (1986); Cherrah, Y., et al.: Biochem. Pharmacol., 37, 1311 (1988);  Chem. and Eng. News p.34, Jan. 20, (2014)<br></p>

<p>Applications Uric Acid is a heterocyclcic compound that is created when purine nucleotides are broken down of by the human body. High blood concetration of Uric Acid is known as hyperuricemia and is often associated with a wide range of disorders and medical conditions such as gout, diabetes and metabolic syndrome. Uric acid may be a marker of oxidative stress and may have a potential therapeutic role as an antioxidant.<br>References Heinig, M. et al.: Cle. Clin. J. Med., 73, 1059 (2006); Glantzounis, G.K. et al.: Curr. Pharmac. Des., 11, 4145 (2005); Dehghan, A. et al.: Diab. Care, 31, 361 (2008); Nakagawa, T. et al.: Am. J. Physiol. Renal Physiol., 290, F625 (2006);<br></p>

<p>Applications 4-Hydroxythiobenzamide is used in the synthesis of PPARα agonists used in increasing HDLc levels. Also used in the synthesis of potent CDK5 inhibitors in the treatment of Alzheimer’s disease.<br>References Sierra, M. et al.: J. Med. Chem., 50, 685 (2007); Zhong, W. et al.: Bioorg. Med. Chem. Lett., 17, 5384 (2007);<br></p>