5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3′-O-[bis(1-methylethyl)phenylsilyl]-2′-deoxy-N-[3,4,5-tris(octadecyloxy)benzoyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-O-[bis(1-methylethyl)phenylsilyl]-2′-deoxycytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-O-[bis(1-methylethyl)phenylsilyl]-2′-deoxy-N-[3,4,5-tris(octadecyloxy)benzoyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(1-methylethoxy)bis(1-methylethyl)silyl]-N-[3,4,5-tris(octadecyloxy)benzoyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-O-[(1-methylethoxy)bis(1-methylethyl)silyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3′-O-[bis(1-methylethyl)phenylsilyl]-2′-deoxy-N-[3,4,5-tris(octadecyloxy)benzoyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-2′-deoxy-3′-O-[tris(1-methylethyl)silyl]-N-[3,4,5-tris(octadecyloxy)benzoyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-2′-deoxy-N-[1,4-dioxo-4-[[3,4,5-tris(octadecyloxy)phenyl]methoxy]butyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-[1,4-dioxo-4-[[3,4,5-tris(octadecyloxy)phenyl]methoxy]butyl]cytidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-N-[1,4-dioxo-4-[[3,4,5-tris(octadecyloxy)phenyl]methoxy]butyl]cytidine

[3,4,5-Tris(octadecyloxy)phenyl]methyl 4-[[1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]amino]-4-oxobutanoate

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

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-P-thioadenylyl-(3′→5′)-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-, 3′-[4-[[3,4,5-tris(octadecyloxy)phenyl]methyl] butanedioate]

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3′-O-[bis(1-methylethyl)phenylsilyl]-3-[3,4,5-tris(octadecyloxy)benzoyl]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3′-O-[bis(1-methylethyl)phenylsilyl]-3-[3,4,5-tris(octadecyloxy)benzoyl]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-O-[bis(1-methylethyl)phenylsilyl]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-O-[bis(1-methylethyl)phenylsilyl]-3-[3,4,5-tris(octadecyloxy)benzoyl]thymidine

Thymidine, N-benzoyl-P(O)-(2-cyanoethyl)-2′-deoxy-P-thioadenylyl-(3′→5′)-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-, 3′-[4-[[3,4,5-tris(octadecyloxy)cyclohexyl]methyl] butanedioate]

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P-thiothymidylyl-(3′→5′)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3-[3,4,5-tris(octadecyloxy)benzoyl]thymidine

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-P(O)-(2-cyanoethyl)-2′-deoxy-N-(2-methyl-1-oxopropyl)-P-thioguanylyl-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-3-[3,4,5-tris(octadecyloxy)benzoyl]thymidine