(+-)-Carbovir 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[(1R,4S)-4-(hydroxymethyl)-2-cyclopenten-1-yl]-, rel- 6H-Purin-6-one, 2-amino-1,9-dihydro-9-[4-(hydroxymethyl)-2-cyclopenten-1-yl]-, cis-(+-)- CARBOVIR GR 90352X Guanine, 9-[4.alpha.-(hydroxymethyl)cyclopent-2-ene-1.alpha.-yl]-,(+-)-cis- NSC614846