9-<6(S)-<(triphenylmethoxy)methyl>-1,4-dioxacyclohexan-2(R)-yl>adenine
5'-O-(triphenylmethyl)adenosine
5'-O-(triphenylmethyl)-2',3'-secoadenosine
(R)-2-[(R)-1-(6-Amino-purin-9-yl)-2-oxo-ethoxy]-3-trityloxy-propionaldehyde
3'-O-p-toluenesulfonyl-5'-O-(triphenylmethyl)-2',3'-secoadenosine