Nucléosides et Nucléotides

<p>Stability Hygroscopic<br>Applications A metabolite of 5-Azacytidine. This compound contains sodium chloride and water.<br>References Lee, T., et al.: Cancer Res., 34, 2482 ( (1974), Drake, J.C., et al.: Biochem. Pharmacol., 29, 807 (1980),<br></p>

<p>Applications Ganciclovir derivative.<br></p>

<p>Applications Sofosbuvir (R)-Phosphate is an impurity of PSI-7977 (P839640), a prodrug that is metabolized to the active antiviral agent 2'-deoxy-2'-α-fluoro-β-C-methyluridine-5'-monophosphate and is currently being investigated in phase 3 clinical trials for the treatment of hepatitis C. Studies have profiled PSI-7977 as a nucleotide inhibitor of hepatitis C virus, exerting selective inhibitory effects towards HCV NS5B polymerase.<br>References Lam, A.M.,et al.: Antimicrob. Agents. Chemotherapy., 56, 3359 (2012); Lam, A.M., et al.: J. Virol., 85, 12334 (2011); Sofia, M.J., et al.: J. Medn. Chem., 53, 7202 (2010)<br></p>

<p>Impurity Fluorouracil EP Impurity B; Fluorouracil USP Related Compound B<br>Applications A 5-hydroxy derivative of the nucleobase Uracil (U801000) and an isomer of Barbituric Acid (B118650). Studies show that it can form stable base pairs with all four bases in a DNA duplex. It has been used as oxidative DNA damage biomarker in tissue engineered skin. Fluorouracil EP Impurity B. Fluorouracil USP Related Compound B<br>References Varatharasa T. et al.: Chem. Comm., 3, 400 (2005); Jaruga, P. et al.: Nucleic Acid Res., 24, 1389 (1996); Rodriguez, H. et al.: Adv. Exp. Med. Biol., 534, 129 (2003);<br></p>

<p>Applications Labelled 5-Methyl Uridine. A primary degradation product of tRNA, an urinary nucleoside as biological marker for patients with colorectal cancer.<br>References Borek, E., et al.: Cancer Res., 37, 3362 (1977), Sander, G., et al.: Clin. Sci.,71, 367 (1986), Sander, G., et al.: Ann. Nutr. Metab., 30, 137 (1986), Rasmuson, T., et al.: Acta Oncol., 34, 61 (1995),<br></p>

<p>Impurity Valganociclovir EP Impurity J<br>Applications Ganciclovir Mono-O-propionate is a potential prodrug of Ganciclovir (G235000). Ganciclovir Mono-O-propionate was also found to exhibit anti-viral activity through experimental studies.<br>References Dias, C.S., et al.: J. Pharma. Sci., 91, 660 (2002);<br></p>

<p>Applications Gemcitabine intermediate.<br>References Balzarini, J., et al.: Biochem. Pharmacol., 1988, 37, 2847 (1988), Hertel, L., et al.: Cancer Res., 50, 4417 (1990), Marquez, V., et al.: J. Med. Chem., 33, 978 (1990),<br></p>

<p>Impurity Abacavir EP Impurity C; Abacavir USP Related Compound A<br>Applications Descyclopropyl Abacavir (Abacavir EP Impurity C; Abacavir Related Compound A) is an intermediate of Abacavir (A105000). Abacavir is a carbocyclic 2'-deoxyguanosine nucleoside reverse transcriptase inhibitor and an anti-HIV drug used to treat HIV infection (1). Intracellular enzymes convert Abacavir to its active form, carbovir-triphosphate (CBV-TP), which then selectively inhibits HIV reverse transcriptase by incorporating into viral DNA (2). Abacavir is metabolized in the liver by uridine diphosphate glucuronyltransferase and alcohol dehydrogenase resulting in inactive glucuronide and carboxylate metabolites, respectively.<br>References (1) Jackson, A., et al.: Antivir Ther. 17, 19 (2012) (2) Yuen, G. J., et al.: Clin Pharmacokinet. 47, 351 (2008)<br></p>

<p>Applications Inhibitor of enzyme. It is used for Phosphodiesterase Substrate.<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 Preuss, C.V., Biochem. Pharmacol., 51, 1661 (1996),<br></p>

<p>Impurity Lamivudine EP Impurity B<br>Applications 2’-Epi-Lamivudine (Lamivudine EP Impurity B) is an epimer of Lamivudine (L172500); an antiviral that inhibits HIV-reverse transcriptase.<br>References Lin, T. et al.: J. Med. Chem., 39, 1757 (1996); Schinazi, R.F. et al.: Antimicrob. Agents Chemother.,36, 672 (1992);<br></p>

<p>Impurity Capecitabine EP Impurity E<br>Applications 5'-Deoxy-5-fluoro-N-[(3-methylbutoxy)carbonyl]cytidine (Capecitabine EP Impurity E) is a 5'-Desoxycytidine derivative and is used as an antitumor agent.<br></p>

<p>Impurity Penciclovir Impurity F<br>Applications 6-Chloro Desacetyl Famciclovir is a prodrug of Penciclovir (P221500); an antiviral.<br>References Weinberg, A., et al.: Antimicrob. Ag. Chemother., 36, 2037 (1992); McMeekin, J.R., et al.: Anal. Proc., 29, 178 (1992)<br></p>

<p>Applications A labelled 2',3'-cyclic nucleotide phosphodiester<br>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),<br></p>

<p>Applications Folic acid dihydrate<br></p>

<p>Applications 2,5,6-Triamino-4(3H)-pyrimidinone Sulfate is used in the preparation of guanines and other purine derivatives with antiviral activities.<br>References Hemmati, S. et al.: Int. J. Chem. Sci., 2, 9 (2004); Chetsanga, C.J. et al.: Chem.-Biol. inter., 58, 117 (1986);<br></p>