1,2-Cyclopentanediol, 3-(6-amino-9H-purin-9-yl)-5-(2-hydroxyethyl)-, (1a,2b,3b,5b)- 118237-79-9 AIDS-001021 AIDS001021 C-2',3'-OH-4'-CH2OH ara-A Carbocyclic-2',3'-OH-4'-CH2OH ara-adenosine NSC613803