Synonyms: [(1R,3S)-3-[2-Amino-6-(cyclopropylamino)-9H-purin-9-yl]cyclopentyl]methanol, Cyclopentanemethanol, 3-[2-amino-6-(cyclopropylamino)-9H-purin-9-yl]-, (1R,3S)-, (1R,3S)-3-[2-Amino-6-(cyclopropylamino)-9H-purin-9-yl]cyclopentanemethanol, Abacavir Sulfate Imp. E (Ph. Int.), Abacavir Sulfate Imp E (EP).