Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-, cyclic 3′,5′-[(3R)-3-methyl-4-(1-methylethoxy)-4-oxobutyl (S)-phosphate]

2′-Deoxy-2′,2′-difluoro-N-[(4-methoxyphenyl)diphenylmethyl]cytidine

Bis(1-methylethyl) 2′-deoxy-2′,2′-difluoro-5′-cytidylate

2-[(3-Hydroxy-2,2-dimethyl-1-oxopropyl)thio]ethyl hydrogen 2′-deoxy-2′,2′-difluoro-5′-cytidylate

Cytidine, 2′-deoxy-2′,2′-difluoro-, 5′-[hydrogen N-(phenylmethyl)phosphoramidate]

D-Alanine, N-(S)-phosphono-, 1-(1-methylethyl) ester, cyclic (P→3′,5′)-ester with 2′-deoxy-2′,2′-difluoro-N-(1-oxo-2-propylpentyl)cytidine

D-Alanine, N-(R)-phosphono-, 1-(1-methylethyl) ester, cyclic (P→3′,5′)-ester with 2′-deoxy-2′,2′-difluoro-N-(1-oxo-2-propylpentyl)cytidine

Bis[(5-nitro-2-furanyl)methyl] 2′-deoxy-2′,2′-difluoro-5′-cytidylate

Bis[(5-nitro-2-furanyl)methyl] 2′-deoxy-2′,2′-difluoro-N-[(4-methoxyphenyl)diphenylmethyl]-3′-O-[(4-methoxyphenyl)diphenylmethyl]-5′-cytidylate

Cytidine, 2′-deoxy-2′,2′-difluoro-, 5′-[(1-methyl-2-nitro-1H-imidazol-5-yl)methyl N-(phenylmethyl)phosphoramidate]

Bis[(5-nitro-2-furanyl)methyl] N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-3′-cytidylate

Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-, 5′-[(1-methyl-2-nitro-1H-imidazol-5-yl)methyl [P(S)]-N-(phenylmethyl)phosphoramidate]

Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-, 5′-[(1-methyl-2-nitro-1H-imidazol-5-yl)methyl [P(R)]-N-(phenylmethyl)phosphoramidate]

Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-, 5′-[2-[(1,1-dimethylethyl)dithio]ethyl [P(S)]-N-(phenylmethyl)phosphoramidate]

Cytidine, N-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-, 5′-[2-[(1,1-dimethylethyl)dithio]ethyl [P(R)]-N-(phenylmethyl)phosphoramidate]

N-[[P(S)]-N-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′,2′-difluoro-5′-cytidylyl]-L-leucine ethyl ester

N-[[P(R)]-N-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P-[2-[(2,2-dimethyl-1-oxopropyl)thio]ethyl]-2′,2′-difluoro-5′-cytidylyl]-L-leucine ethyl ester

N,N′-[N-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-2′,2′-difluoro-5′-cytidylylidene]bis[L-leucine] 1,1′-dimethyl ester

N-[[P(S)]-N-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P-(2-ethoxy-2-oxoethyl)-2′,2′-difluoro-5′-cytidylyl]-L-leucine ethyl ester

N-[[P(R)]-N-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-P-(2-ethoxy-2-oxoethyl)-2′,2′-difluoro-5′-cytidylyl]-L-leucine ethyl ester