(+/-)-cis-[3-(2,6 Diamino-9H-purin-9-yl)cyclopentyl]-carbinol 120330-36-1 AIDS-000267 AIDS000267 C-dd-2-6-diNH2-purinenucleo Carbocyclic-2',3'-dideoxy-2-6-diaminopurinenucleoside NSC615814