9-β-D-Arabinofuranosyl-1,9-dihydro-8-(1-pyrrolidinyl)-6H-purin-6-one

Guanosine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (S)-

Adenosine, N-benzoyl-5′-O-[(4-methoxyphenyl)diphenylmethyl]-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (S)-

Cytidine, N-benzoyl-5′-O-[(4-methoxyphenyl)diphenylmethyl]-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (S)-

3′-Uridylic acid, 2′-O-[(2-nitrophenyl)methyl]cytidylyl-(3′→5′)-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl) ester

Uridine, N-benzoyl-P-(4-chlorophenyl)-5′-O-[(4-methoxyphenyl)diphenylmethyl]-2′-O-[(2-nitrophenyl)methyl]cytidylyl-(3′→5′)-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate)

Guanosine, N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (S)-

Adenosine, N-benzoyl-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (S)-

Uridine, 2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (S)-

Guanosine, N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Adenosine, N-benzoyl-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Cytidine, N-benzoyl-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Uridine, 2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Guanosine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]-N-(2-methyl-1-oxopropyl)-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Cytidine, N-benzoyl-5′-O-[(4-methoxyphenyl)diphenylmethyl]-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Uridine, 5′-O-[(4-methoxyphenyl)diphenylmethyl]-2′-O-[(2-nitrophenyl)methyl]-, 3′-(4-chlorophenyl phenylphosphoramidate), (R)-

Inosine, 2-methyl-, 2′,3′,5′-triacetate

Adenosine, 2′-deoxy-, cyclic 3′,5′-(phenylphosphoramidate), (R)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-[S-methyl bis(1-methylethyl)phosphoramidothioate]

Thymidine, 5-[(2-cyanoethyl)thio]-3′,5′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5,6-dihydro-