Abacavir EP Impurity B Catalogue No. - VL760001 CAS No. - 1443421-69-9 Molecular Formula - C18H21ClN10O Molecular Weight - 428.8 IUPAC Name - 6-(Cyclopropylamino)-9-[(1R,4S)-4-[[(2,5-diamino-6-chloropyrimidin-4-yl)oxy]methyl]cyclopent-2-enyl] Synonyms - Abacavir O-Pyrimidine Impurity / Abacavir Related Compound D