N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(S)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-N-[4-[2-[methyl[3,4,5-tris(octadecyloxy)benzoyl]amino]ethoxy]-1,4-dioxobutyl]cytidine

Cytidine, P(S)-2-benzothiazolyl-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P-thioadenylyl-(3′→5′)-2′-deoxy-N-[4-[2-[methyl[3,4,5-tris(octadecyloxy)benzoyl]amino]ethoxy]-1,4-dioxobutyl]-, 3′-(4-oxopentanoate)

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P(S)-methyl-P-thioadenylyl-(3′→5′)-2′-deoxy-N-[4-[2-[methyl[3,4,5-tris(octadecyloxy)benzoyl]amino]ethoxy]-1,4-dioxobutyl]-, 3′-(4-oxopentanoate)

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P(S)-(4-methylphenyl)-P-thioadenylyl-(3′→5′)-2′-deoxy-N-[4-[2-[methyl[3,4,5-tris(octadecyloxy)benzoyl]amino]ethoxy]-1,4-dioxobutyl]-, 3′-(4-oxopentanoate)