Nucleosídeos e Nucleotídeos

Applications Emtricitabine N,N’-Methylene Dimer is a derivative compound of Emtricitabine (E525000), a reverse transcriptase inhibitor. It is effective antiviral agent against HIV, and other viruses replicating in a similiar manner. A nucleoside analog structurally related to Lamivudine (L172500).
References FASEB J., 13, 1511 (1999), Molina, J.-M., et al.: J. InfecSchinazi, R.F., et al.: Antimicrob. Ag. Chemother., 36, 2423 (1992), Shockeor, J.P., et al.: Xenobioica, 26, 189 (1996), Feng, J.Y., et al.: . Dis., 182, 599 (2000)

Applications Labelled Azathioprine (A803350). An immunosuppressive antimetabolite. Also active as disease modifying antirheumatic drug (DMARD).
References Mitrou, P.S., et al.: Arzneim.-Forsch., 29, 483, 662 (1979), Ding, T.L., et al.: Drug. Metab. Dispos., 7, 373 (1979), Chan, G.L.C., et al.: Pharmacotherapy, 7, 165 (1987), Sandborn, W.J., et al.: : Scand. J. Gastroenterol., 33, Suppl. 225, 92 (1998,)

Applications Capecitabine (C175650) impurity.

Applications 5'-Deoxy-5'-chloroadenosine is an intermediate in the synthesis of 5'-Deoxy-5'-(methylthio)adenosine (D242600), a substrate to study the specificity and kinetics of 5′-methylthioadenosinephosphorylase (MTAP) (EC2.4.2.28), a tumor suppressor gene expressed enzyme that supports the S-adenosylmethionine (AdoMet) and methionine salvage pathways.
References Olopade, O., et al.: Cancer Res., 53, 2410 (1993), Hartmann, S., et al.: Clin. Chem., 52, 1127 (2006), Penner, N., et al.: J. Pharm. Biomed. Anal., 52, 534 (2010),

Applications A 2-substituted 2’-Deoxyadenosine (D231620). Used in the synthesis of oligonucleotides.
References Ishikawa, F., et al.: J. Mol. Biol., 70, 475 (1972), Hattori, M., et al.: Biochemistry, 13, 2754 (1974), Kazimierczuk, Z., et al.: J. Med. Chem., 33, 1683 (1990),

Applications A novel labelled HIV reverse transcriptase inhibitor useful in treatment of HIV infection.
References Scholler-Gyure, M., et al.: J. Clin. Pharmacol., 48, 322 (2008), Thakur, A., et al.: Eur. J. Med. Chem., 43, 471 (2008),

Applications The 2-epi-enantiomer analogue of (-)-Emtricitabine (E525000) evaluated against HIV-1 in human peripheral blood mononuclear (PBM) cells.
References Jeong, L.S., et al.: J. Med. Chem., 36, 2627 (1993),

Impurity Capecitabine 2-O-BDR Impurity (USP)
Stability Hygroscopic
Applications Capecitabine (C175650) impurity. Capecitabine 2-O-BDR Impurity (USP).

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

Applications 2'-Deoxy-2'-fluorocytidine is a potent inhibitor of the subgenomic hepatitis C virus replicon in Huh-7 cells. 2'-Deoxy-2'-fluorocytidine has been shown to inhibit Borna Disease virus replication and spread.
References Stuyver, L.J. et al.: Antimicrob. Agents Chemother., 48, 651 (2004); Bajramovic, J.J. et al.: Antiomicrob. Agents Chemother., 48, 1422 (2004);

Stability Hygroscopic
Applications A metabolite of (-)-Emtricitabine (E525000).
References Paff, M. et al.; Antimicrob. Agents Ch. 38, 1230 (1994)

Impurity Abacavir EP Impurity F
Applications N6-Cyclopropyl-9-[(1R,4S)-4-[(1,1-dimethylethoxy)methyl]-2-cyclopenten-1-yl]-9H-purine-2,6-diamine (Abacavir EP Impurity F) is an impurity of Abacavir (A104990), a guanosine analog that inhibits reverse transcriptase (NRTI) (1,2).
References (1) Hanumegowda, U., et al.: Chem. Res. Toxicol., 23, 749 (2010) (2) Prasse, C., et al.: Environ. Sci. Technol., 44, 1728 (2010)

Applications (1R,3R,4R)-Entecavir is an isomeric impurity of Entecavir (E558900).

Impurity Lamivudine EP Impurity H
Stability Hygroscopic
Applications Lamivudine (R)-Sulfoxide (Lamivudine EP Impurity H) is a metabolite of Lamivudine (L172500); a potent nucleoside reverse transcriptase inhibitor and antiviral agent. Lamivudine has been used for treatment of chronic hepatitis B.
References Morris, D.M., J. Pharm. Biomed. Anal., 12, 255 (1944); Nevens, B.F., et al.: Gastroenterology, 113, 1258 (1997); Perry, C.M., et al.: Drugs, 53, 657 (1977)