3'-O-[(1,1-Dimethylethyl)diphenylsilyl]-5'-S-(2-ethoxy-2-oxoethyl)-5-methyl-2'-O-methyl-5'-thiouridine

5-(5-Azido-1-pentyn-1-yl)-2'-deoxyuridine

2'-O-[2-[(6-Azido-1-oxohexyl)amino]ethyl]-5-methyluridine

2'-O-(2-Azidoethyl)-5-methyluridine

3'-O-Benzoyl-5'-O-[(4-methoxyphenyl)diphenylmethyl]-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-4-O-(4-chlorophenyl)-2'-O-methyluridine

5-[(1E)-3-Amino-3-oxo-1-propen-1-yl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-[(3-carboxy-1-oxopropyl)amino]-2'-deoxyuridine

2'-[(4-Amino-1,4-dioxobutyl)amino]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

3'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-S-phenyl-2'-C-(phenylthio)-2'-thiouridine

3'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-2'-S-phenyl-2'-C-(phenylthio)-2'-thiouridine

N-Benzoyl-3'-O-benzoyl-P-[2-(4-nitrophenyl)ethyl]adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

1'-[3-(Aminocarbonyl)-1H-1,2,4-triazol-1-yl]-3'-O-benzoyl-1'-de(6-amino-9H-purin-9-yl)-P-[2-(4-nitrophenyl)ethyl]adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

3'-O-Benzoyl-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

N-Benzoyl-3'-O-benzoyl-5'-O-[(4-methoxyphenyl)diphenylmethyl]-P-[2-(4-nitrophenyl)ethyl]adenylyl-(2'→5')-3'-O-benzoyl-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

3'-O-Benzoyl-5'-O-[(4-methoxyphenyl)diphenylmethyl]-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-N-benzoyl-3'-O-benzoyl-P-[2-(4-nitrophenyl)ethyl]adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

Guanylylmethylene-(3'→5')-5'-deoxyuridine

3'-O-Benzoyl-5'-O-[(4-methoxyphenyl)diphenylmethyl]-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-3'-O-benzoyl-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

3',3'''-Dithiobis[2',3'-dideoxycytidine]

3',3'''-Dithiobis[2',3'-dideoxyuridine]