Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxythymidylyl-(3′→5′)-N-benzoyl-P,2′-dideoxyadenylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-(4-oxopentanoate)

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxyadenylyl-(3′→5′)-, 3′-(4-oxopentanoate)

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-thiothymidylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P-deoxythymidylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxyadenylyl-(3′→5′)-, 3′-(4-oxopentanoate)

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′-dideoxyadenylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-(4-oxopentanoate)

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxy-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Cytidine, P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxy-N-(2-methyl-1-oxopropyl)guanylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-benzoyl-P(O)-(2-cyanoethyl)-2′-deoxy-P-thioadenylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-P-thiocytidylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxycytidylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-benzoyl-P(O)-(2-cyanoethyl)-2′-deoxy-P-thiocytidylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-P-thioadenylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxyadenylyl-(3′→5′)-N-benzoyl-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-

Thymidine, N-benzoyl-P(O)-(2-cyanoethyl)-P-deoxo-2′-deoxycytidylyl-(3′→5′)-, 3′-(4-oxopentanoate)

Thymidine, N-benzoyl-P(O)-(2-cyanoethyl)-2′-deoxy-P-thiocytidylyl-(3′→5′)-, 3′-(4-oxopentanoate)