Nucleosides and Nucleotides

Impurity Emtricitabine Carboxylic Acid Impurity
Applications Emtricitabine Carboxylic Acid is an impurity of the antiviral agent Emtricitabine (E525035).
References Pendela, M. et al.: Talanta, 82, 125 (2010);

Applications Second generation purine nucleoside analog; antimetabolite that inhibits DNA synthesis and resists deamination by adenosine deaminase. Antineoplastic.
Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package
References Gandhi, V., et al.: Clin. Cancer Res., 9, 6335 (2003), Kantarjian, H., et al.: Blood, 102, 2379 (2003), Faderl, S., et al.: Cancer, 103, 1985 (2005),

Applications 2-Hydroxy-2,3-tetrahydrofuranyl Entecavir is an impurity of Entecavir (E558900).

Stability Moisture Sensitive
Applications Adenosine 5’-Diphosphate-13C5 Ammonium Salt Hydrate is the isotope labelled analog of Adenosine 5’-Diphosphate Ammonium Salt Hydrate (A281700); a nucleoside diphosphate that interacts with a family of ADP receptors found on platelets (P2Y1, P2Y12 and P2X1), to induce platelet activation. ADP in the blood is converted to adenosine by the action of ecto-ADPases, inhibiting further platelet activation via adenosine receptors.
References Gamba, G. et al.: Haematologia, 58, 1215 (1973); Dejana, E. et al.: Thromb. Haemost., 39, 135 (1978)

Stability Moisture Sensitive
Applications 2,3-Dichloropropionyl Chloride is used as a reagent in the synthesis of 6-chloro-5-cyclohexyl-1-indancarboxylic acid, a potent analgesic, antipyretic, and antiinflammatory agent, and its related compounds.
Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package
References Sawa, Y., et al.: Yakugaku Zasshi, 96, 653 (1976)

Stability Moisture Sensitive
Applications 1,2-bis(Chloromethoxy)ethane is a carcinogenic compound.
References Kar, S., Roy, K.: Chemoshpere, 87, 339 (2012)

Applications Methyl 4-Chlorobenzoate is a reactant used in the synthesis of ataxia-telangiectasia mutated (ATM) kinase, a target for novel radiosensitizing agents. As well, used as a reactant in the synthesis of aminopyridine functionalized polyacrylonitrile fibers.
References Min, J. et al.: J. Med. Chem., 59, 559 (2016);

Impurity Entecavir EP Impurity D
Applications 4’-epi-Entecavir is an epimeric impurity of the antiviral drug Entecavir (E558900).

Applications A labelled metabolite of Capecitabine.
References Arellano, M., ET AL.: Br. J. Cancer, 77, 79 (1998), Budman, D., ET AL.: J. Clin. Oncol., 16, 1795 (1998), Khanna, R., et al.: Cancer Res., 60, 4725 (2000), Charasson, V., et al.: Drug Metab. Dispos., 30, 731 (2002),

Stability Moisture Sensitive
Applications Cytidine 5'-diphosphocholine (cas# 987-78-0) is a useful research chemical.

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

Impurity Abacavir EP Impurity C; Abacavir USP Related Compound A
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.
References (1) Jackson, A., et al.: Antivir Ther. 17, 19 (2012) (2) Yuen, G. J., et al.: Clin Pharmacokinet. 47, 351 (2008)

Stability Hygroscopic
Applications Acyclovir L-Leucinate is an amino acid ester of the antiherpetic agent, Acyclovir (A192400). It is the Leucine analogue of Valacyclovir (V085000).
References Burnette, T. et al.: J. Biol. Chem., 270, 15827 (1995);

Stability Moisture Sensitive
Applications 1-(5-O-Acetyl-β-D-ribofuranosyl)-4-amino-1,3,5-triazin-2(1H)-one is an impurity of 5-Azacytidine (A796000), a potent growth inhibitor and cytotoxic agent. It acts as a demethylating agent by inhibiting DNA methyltransferase.
References Kusaba, H., et al.: Eur. J. Biochem., 262, 924 (1999), Broday, L., et al.: Mol. Cell Biol., 19, 3198 (1999), Qian, X., et al.: Am. J. Pathol., 153, 1475 (1999), Canova, C., et al.: Mech. Ageing Dev., 101, 153 (1998)

Stability Hygroscopic
Applications D-Melphalan is an isomer of melphalan (M216900), which is an antineoplastic.
Not a dangerous good if item is equal to or less than 1g/ml and there is less than 100g/ml in the package
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 L-Tetrahydrofolic Acid-d4 (Major) is a folic acid derivative and coenzyme involved in the metabolism of amino and nucleic acids.
References Prinz-Langenohl, R., et al.: Brit. J. Pharmacol., 158, 2014 (2009), Martin, H., et al.: Anal. Biochem., 402, 137 (2010), Dasarathy, J., et al.: Am. J. Clin. Nut., 91, 357 (2010), Karas-Kuzelicki, N., et al.: Clin. Biochem., 43, 37 (2010),