N-Benzyloxy-N-[(1S,4R)-4-(6-chloro-purin-9-yl)-cyclopent-2-enyl]-acetamide

cis-4(R)-(6-cyclopropylamino-9H-purin-9-yl)-1(S)-N-(N-tert-butyloxycarbonylhydroxamino)cyclopent-2-ene

cis-4(R)-(6-amino-9H-purin-9-yl)-1(S)-N-[N-tert-butyloxycarbonyl(benzyloxy)amino]cyclopent-2-ene

5(R)-(6-amino-9H-purin-9-yl)-1(S),2(R)-dihydroxy-3(S)-N-[N-tert-butyloxycarbonyl(benzyloxy)amino]cyclopentane

5(R)-(6-chloro-9H-purin-9-yl)-1(S),2(R)-dihydroxy-3(S)-N-[(N-tert-butyloxycarbonyl-O-carbobenzyloxy)amino]cyclopentane