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

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

Cytidine, N-benzoyl-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-2′-O-(2-methoxyethyl)-5-methyl-

Uridine, 2′-O-(2-methoxyethyl)-5-methyl-, 3′-[4-oxo-4-[4-[3,4,5-tris(octadecyloxy)benzoyl]-1-piperazinyl]butanoate]