Descyclopropyl Abacavir; (1S,4R)-4-(2,6-Diamino-9H-purin-9-yl)-2-cyclopentene-1-methanol; ((1S,4R)-4-(2,6-diamino-9H-purin-9-yl)cyclopent-2-en-1-yl)methanol; Descyclopropyl Abacavir; [(1S,4R)-4-(2,6-Diamino-9H-purin-9-yl)cyclopent-2-enyl]methanol