(1R,2S,3R,5R)-3-(6-Amino-9H-purin-9-yl)-5-(hydroxymethyl)-1,2-cyclopentanediol 1,2-Cyclopentanediol, 3-(6-amino-9H-purin-9-yl)-5-(hydroxymethyl)-, (1R,2S,3R,5R)- 19186-33-5 Aristeromycin Cycloadenosine NSC 103526