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

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

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

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

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

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

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

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

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-2′-O-(2-methoxyethyl)-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-deoxothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

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

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

Thymidine, P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Cytidine, P-(2-cyanoethyl)-2′-O-(2-methoxyethyl)-5-methyluridylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-O-(2-methoxyethyl)-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-2′-O-(2-methoxyethyl)-5-methyl-

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

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