Nucleosidi e Nucleotidi

Impurity Entecavir EP Impurity A
Applications An epimeric impurity of the antiviral drug Entecavir (E558900).

Applications D-Ribose is produced by microorganism fermentation of glucose in a fermentation culture medium without adding calcium carbonate.
References Ostrowski, S., et al.: Science, 305, 71 (2004), Vavilin, D., et al.: Biochim. Biophys. Acta, 1708, 91 (2005), Fletcher, J., et al.: Anal. Chem., 79, 2199 (2007), Weissleder, R., et al.: Nature, 452, 580 (2008),

Applications A 2',3'-cyclic nucleotide phosphodiester.
References Voegtli, W., et al.: Biochemistry, 39, 15365 (2000), Bernstein, N., et al.: Mol. Cell, 17, 657 (2005), Blondal, T., et al.: J. Biol. Chem., 280, 5188 (2005), Shenoy, A., et al.: J. Mol. Biol., 365, 211 (2007),

Applications The epimer of the degradation product of Gemcitabine (G305000), a new antitumor agent.
References Anliker, S.L., et al.: J. Pharmaceut. Sci., 83, 716 (1994),

Applications An effective agent for increasing nicotinamide adenine dinucleotide (NAD) concentrations in mammalian cells.
References Yang, T. et al.: J. Med. Chem., 50, 6458 (2007);

Impurity Fluorouracil EP Impurity D
Applications 5-Methoxyuracil (Fluorouracil EP Impurity D) is methoxylated uracil, a component of nucleid acid. 5-Methoxyuracil is used in the preparation of nucleosides.
References Vorbrueggen, H. et al.: Chem. Ber., 114, 1279 (1981); Novacek, A. et al.: Coll. Czech. Chem. Comm., 32, 1045 (1967);

Applications Hypocholesterolemic isolated from shiitake mushrooms, effecting phospholipid and linoleic acid metabolisms. Specifically, Eritadenine is a potent inhibitor of S-adenosyl-L-homocysteine hydrolase (SAHH), decreasing total cholesterol levels in plasma.
References Fukada, S., et al.: J. Nut., 136, 2797 (2006), Vilar, S., et al.: J. Med. Chem., 49, 1118 (2006), Yamada, T., et al.: Biochem. Pharmacol., 73, 981 (2007), Enman, J., et al.; J. Agric. Food Chem., 56, 2609 (2008),

Impurity Valaciclovir EP Impurity I/ Aciclovir USP Related Compound A
Applications Acyclovir Acetate (Valaciclovir EP Impurity I) is an Acyclovir (A192400) impurity, Aciclovir EP Impurity A
References Goskonda, V., et al.: J. Pharm. Sci., 88, 180 (1999); Chang, J., et al.: Pharm. Res., 17, 670 (2000),

Impurity Famciclovir USP Related Compound F
Applications Famciclovir USP Related Compound F

Applications An impurity of Levomefolate (L375720), the natural form of folic acid.
References Verlinde, P.H.C.., et al.: J. Agr. Food. Chem., 57, 6803 (2009); Whiteley, J.M., et al.: Biochem. Biophy. Res. Comm., 101, 1259 (1981);

Stability Hygroscopic
Applications Dapagliflozin-D5 is a labelled analogue of Dapagliflozin (D185370), a selective sodium-glucose cotransporter-2 inhibitor that reduces renal glucose reabsorption and is used to treat patients with type 2 diabetes.
References List, J., et al.: Diabetes Care, 32, 650 (2009); Meng, W., et al.: J. Med. Chem., 51, 1145 (2008); Wilding, J., et al.: Diabetes Care, 32, 1656 (2009)

Applications Gemcitabine Monophosphate is a gemcitabine derivative. It is an antineoplastic agent.
References Balzarini, J., et al.: Biochem. Pharmacol., 37, 897 (1988), Abbruzzese, J., et al.: Investig. New Drugs, 7, 195 (1989), Balzarini, J., et al.: J. Biol. Chem., 264, 6127 (1989), Chu, C., et al.: Antimicrob. Agents Chemother., 39, 979 (1995)

Applications Dihydroxy Melphatalan is an analogue of Melphalan (M216900), an antineoplastic.
References Ross, W.C.J., et al.: Biochem. Pharmacol., 13, 969 (1964); Donelli, M.G., et al.: J. Pharm. Pharmacol., 18, 760 (1966), Furner, R.L., et al.: Cancer Treat. Rep., 64, 559 (1980);

Applications T-705 Ribofuranose is a reagent used for the preparation of pyrazine-ribofuranose derivatives as antiviral agents that are useful in the treatment of viral infections.
References Zhong, B., et al.: Faming Zhuanli Shenqing, 2014:924257 (2014)

Applications 6-Mercaptopurine Disulfide is an impurity of 6-Mercaptopurine (M225450, monohydrate) which is an immunosuppressive drug used to treat leukemia. It is also used for pediatric non-Hodgkin’s lymphoma, polycythemia vera, and psoriatic arthritis.
References Zeng, H., et al.: Biochem. Pharmacol., 68, 911 (2004)

Impurity Zidovudine USP Related Compound G
Stability Light Sensitive
Applications 3'-[3-(3-Azido-2,3-dideoxy-β-D-erythro-pentofuranosyl)-3,6-dihydro-5-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-3'-deoxy-thymidine (Zidovudine USP Related Compound G) is used in the biological studies and in the preparation of N-3-substituted thymidine nucleosides as virucides as it has anti-HIV activity.
References Adams, D.R., et al.: J. Med. Chem., 40, 1550 (1997), Mainardes, R., et al.: J. Pharm. Sci., 98, 257 (2009),

Stability Very Hygroscopic
Applications A metabolite of the pesticide Glyphosphate (G765000).
References Siehl, D.L. et al.: J. Biol. Chem., 282, 11446 (2007); Env. Prot. Agen. EPA: Fed. Reg., 74, 67129 (2009);