1-{2'-O-[(4'',4'''-dimethoxytriphenyl)methyl]-α-L-arabinopyranosyl}-N4-isobutyrylcytosine

N6-benzoyl-9-(2'-O-{[(9H-fluoren-9-yl)methoxy]carbonyl}-3',4'-O-isopropylidene-α-L-arabinopyranosyl)adenine

1-(2'-O-{[(9H-fluoren-9-yl)methoxy]carbonyl}-3',4'-O-isopropylidene-α-L-arabinopyranosyl)thymine

N4-benzoyl-(2'-O-{[(9H-fluoren-9-yl)methoxy]carbonyl}-α-L-arabinopyranosyl)cytosine

2,3,4-tri-O-benzoyl-β-L-arabinopyranosyl trichloroacetimidate-4C1