Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)adenylylmethylene(methylimino)-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)thymidylylmethylene(methylimino)-(3′→5′)-2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-

Cytidine, 2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-5′-O-(methylamino)-

Adenosine, 2′-deoxy-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-O-(methylamino)-

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)-5-methylcytidylylmethylene(methylimino)-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)-5-methylcytidylylmethylene(methylimino)-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-3′-formyl-5-methyl-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-3′-[(1E)-2-phenylethenyl]-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-3′-[(1E)-2-phenylethenyl]-

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-N-(2-methyl-1-oxopropyl)-3′-[(1E)-2-phenylethenyl]-

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)adenylylmethylene(methylimino)-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)adenylylmethylene(methylimino)-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)-N-(2-methyl-1-oxopropyl)guanylylmethylene(methylimino)-(3′→5′)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Adenosine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-3′-formyl-

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-3′-formyl-

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-3′-formyl-N-(2-methyl-1-oxopropyl)-

Cytidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′,3′-dideoxy-5-methyl-3′-[(1E)-2-phenylethenyl]-

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-deoxy-3′-[(1E)-2-phenylethenyl]-

Thymidine, 5′-O-(dimethylamino)-3′-O-[(1,1-dimethylethyl)diphenylsilyl]-

Thymidine, 3′-O-[(1,1-dimethylethyl)diphenylsilyl]-5′-O-(methylphenylamino)-