Synonyms: Abacavir Imp. C (EP), Abacavir USP Related Compound A, Abacavir USP RC A,2-Cyclopentene-1-methanol, 4-(2,6-diamino-9H-purin-9-yl)-, (1S,4R)-, 2-Cyclopentene-1-methanol, 4-(2,6-diamino-9H-purin-9-yl)-, (1S-cis)-, Descyclopropyl Abacavir, Abacavir Related Compound A (USP), Abacavir Sulfate Imp. C (Ph. Int.), Abacavir Sulfate Imp C (EP), 139U91 (GR92685X), GW 466608X, GW 470921X, GW 403126X, GW 357662X, GW 444710X, Abacavir Related Compound A, Abacavir Sulfate Impurity C, Abacavir Impurity C.