9-((1'R,4'R,5'S)-3-(tert-butoxymethyl)-4,5-(cyclohexylidenedioxy)-2-cyclopenten-1-yl)adenine

9-{(3aS,4R,6aR)-6-{{[(1,1-dimethylethyl)dimethylsilyl]oxy}methyl}-3a,6a-dihydro-2,2-dimethyl-4H-cyclopenta[d]-1,3-dioxol-4-yl}-9H-purin-6-amine

(1'S,2'R,3'S,4'R)-4'-(6-chloropurin-9-yl)-1'-hydroxymethyl-1',2,'3'-trihydroxy-cyclopent-1'-ene

(1'S,2'R,3'S,4'R)-4'-(6-chloropurin-9-yl)-1'-hydroxymethyl-2',3'-O-isopropylidene-cyclopentane-1',2',3'-triol

(3'S,4'R)-4'-(6-chloropurin-9-yl)-3'-hydroxy-1'-methoxycarbonyl-cyclopent-1'-ene