(1'S,2'R,4''S)-1-[[2-(2,2-dimethyl-1,3-dioxolan-4-yl)cyclopropyl]-methyl]-6-adenine

(1'S,2'R)-1-[[2-[(1S)-1,2-dihydroxyethyl]cyclopropyl]methyl]guanine

(1'S,2'R)-1-[[2-[(1S)-1,2-dihydroxyethyl]cyclopropyl]methyl]thymine