Cytidine, 2′-deoxy-5′-O-[hydroxy[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethoxy]phosphinyl]-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-2′-deoxy-N-(4-methoxybenzoyl)-, 3′-acetate

Cytidine, 5′-O-[hydroxy[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethoxy]phosphinyl]thymidylyl-(3′→5′)-2′-deoxy-N-(4-methoxybenzoyl)-, 3′-acetate

Thymidine, 5′-O-[hydroxy[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethoxy]phosphinyl]thymidylyl-(3′→5′)-, 3′-acetate

5′-Cytidylic acid, 2′-deoxy-N-(4-methoxybenzoyl)-, mono[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethyl] ester

5′-Guanylic acid, 2′-deoxy-N-(2-methyl-1-oxopropyl)-, mono[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethyl] ester

5′-Adenylic acid, N-benzoyl-2′-deoxy-, mono[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethyl] ester

5′-Thymidylic acid, mono[2-[[4-(triphenylmethyl)phenyl]sulfonyl]ethyl] ester

5′-Guanylic acid, 3′-O-acetyl-2′-deoxy-N-(4-methoxybenzoyl)cytidylyl-(5′-→3′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 5′-[2-[[4-(triphenylmethyl)phenyl]thio]ethyl] ester

Cytidine, 2′-deoxy-N-(2-methyl-1-oxopropyl)-5′-O-phosphonoguanylyl-(3′→5′)-2′-deoxy-N-(4-methoxybenzoyl)-

Thymidine, 5′-O-[hydroxy[2-[[4-(triphenylmethyl)phenyl]thio]ethoxy]phosphinyl]thymidylyl-(3′→5′)-, 3′-acetate

5′-Guanylic acid, 2′-deoxy-N-(2-methyl-1-oxopropyl)-, mono[2-[[4-(triphenylmethyl)phenyl]thio]ethyl] ester

Adenosine, N-benzoyl-2′-deoxy-, mono[2-[[4-(triphenylmethyl)phenyl]thio]ethyl] ester

5′-Cytidylic acid, 2′-deoxy-N-(4-methoxybenzoyl)-, mono[2-[[4-(triphenylmethyl)phenyl]thio]ethyl] ester

5′-Thymidylic acid, mono[2-[[4-(triphenylmethyl)phenyl]thio]ethyl] ester

N-[1-[(5S)-5-Deoxy-5-(diethoxyphosphinyl)-2,3-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[[(4-methoxyphenyl)methylene]amino]-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]acetamide

N-[1-[(5R)-5-Deoxy-5-(diethoxyphosphinyl)-2,3-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[[(4-methoxyphenyl)methylene]amino]-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]acetamide

Uridine, 5′-deoxy-5′-(diethoxyphosphinyl)-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-[[(4-methoxyphenyl)methylene]amino]-, (5′R)-

Cytidine, N-acetyl-5′-deoxy-5′-(diethoxyphosphinyl)-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-[[(4-methoxyphenyl)methylene]amino]-, (5′R)-

Uridine, 5′-amino-5′-deoxy-5′-(diethoxyphosphinyl)-2′,3′-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-, (5′S)-

N-[1-[(5S)-5-Deoxy-5-(diethoxyphosphinyl)-2,3-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-[[(4-methoxyphenyl)methyl]amino]-β-D-arabinofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]acetamide