Thymidine, 5′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-[(phenoxycarbonyl)[(phenoxycarbonyl)oxy]amino]-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P,P-dithioguanylyl-(3′→5′)-2′-deoxy-P,P-dithiocytidylyl-(3′→5′)-P,P-dithiothymidylyl-(3′→5′)-2′-deoxy-P,P-dithioadenylyl-(3′→5′)-2′-deoxy-P,P-dithioguanylyl-(3′→5′)-2′-deoxy-P,P-dithiocytidylyl-(3′→5′)-P,P-dithiothymidylyl-(3′→5′)-2′-deoxy-

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[S-[(1-methyl-1H-imidazol-2-yl)methyl] hydrogen phosphorodithioate]

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[S-[(4-chloro-2-nitrophenyl)methyl] hydrogen phosphorodithioate]

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-[S-[(2,4-dichlorophenyl)methyl] hydrogen phosphorodithioate]

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-[(1-methyl-1H-imidazol-2-yl)methyl] hydrogen phosphorodithioate]

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-[(4-chloro-2-nitrophenyl)methyl] hydrogen phosphorodithioate]

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-[(2,4-dichlorophenyl)methyl] hydrogen phosphorodithioate]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-[(1-methyl-1H-imidazol-2-yl)methyl] hydrogen phosphorodithioate]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-[(4-chloro-2-nitrophenyl)methyl] hydrogen phosphorodithioate]

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[S-[(2,4-dichlorophenyl)methyl] hydrogen phosphorodithioate]

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-[S-[(1-methyl-1H-imidazol-2-yl)methyl] hydrogen phosphorodithioate]

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-[S-[(4-chloro-2-nitrophenyl)methyl] hydrogen phosphorodithioate]

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-[(1-methyl-1H-imidazol-2-yl)methyl]-P-thiothymidylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-[(4-chloro-2-nitrophenyl)methyl]-P-thiothymidylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-[(1-methyl-1H-imidazol-2-yl)methyl]-P-thiothymidylyl-(3′→5′)-, 3′-acetate

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-[(4-chloro-2-nitrophenyl)methyl]-P-thiothymidylyl-(3′→5′)-, 3′-acetate

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-[(2,4-dichlorophenyl)methyl]-P-thiothymidylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-[(1-methyl-1H-imidazol-2-yl)methyl]-P,P-dithiothymidylyl-(3′→5′)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-[(4-chloro-2-nitrophenyl)methyl]-P,P-dithiothymidylyl-(3′→5′)-