neplanocin D

4',4'-O-Didehydro-4'-O-carbainosine

9-[(1β)-4β-(Hydroxymethyl)-2α,3α-dihydroxy-4-cyclopentenyl]-9H-purine-6(1H)-one

9-[(1R)-4β,5β-Dihydroxy-3-(hydroxymethyl)-2-cyclopenten-1α-yl]-1,9-dihydro-6H-purin-6-one