3',5'-O-[Bis(1,1-dimethylethyl)silylene]-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-N-methyladenosine

3'-Amino-N-benzoyl-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2',3'-dideoxycytidine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluoro-3'-O-[(4-methoxyphenyl)diphenylmethyl]-4'-C-methylcytidine

1-[2-Deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-2-[[(4,5-dimethoxy-2-nitrophenyl)methyl]thio]-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-1H-benzimidazole

2',5'-Di-O-methylcytidine

5'-[4-[[(9S)-Cinchonan-9-yloxy]methyl]-1H-1,2,3-triazol-1-yl]-2',5'-dideoxy-5-fluorouridine

2',5'-Dideoxy-5'-[4-[[(R)-[(1S,2S,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]oct-2-yl]-4-quinolinylmethoxy]methyl]-1H-1,2,3-triazol-1-yl]-5-fluorouridine

2',5'-Dideoxy-5'-[4-[[(S)-[(1S,2R,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]oct-2-yl](6-methoxy-4-quinolinyl)methoxy]methyl]-1H-1,2,3-triazol-1-yl]-5-fluorouridine

2',5'-Dideoxy-5'-[4-[[(R)-[(1S,2S,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]oct-2-yl](6-methoxy-4-quinolinyl)methoxy]methyl]-1H-1,2,3-triazol-1-yl]-5-fluorouridine

2'-O-[(2R)-2-Methoxypropyl]-5-methyluridine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluoro-3'-O-[(4-methoxyphenyl)diphenylmethyl]-4'-C-methyluridine

(2'R)-N-(Cyclopropylcarbonyl)-2'-deoxy-2'-fluoro-2'-methylcytidine

(2'R)-N-(4-Bromo-1-oxobutyl)-2'-deoxy-2'-fluoro-2'-methylcytidine

(2'R)-2'-Deoxy-2'-fluoro-N-(2-methoxyacetyl)-2'-methylcytidine

(2'R)-2'-Deoxy-N-(2-ethyl-1-oxobutyl)-2'-fluoro-2'-methylcytidine

(2'R)-N-Acetyl-2'-deoxy-2'-fluoro-2'-methylcytidine

(2'R)-N-Butyl-2'-deoxy-2'-fluoro-2'-methylcytidine

(2'R)-2'-Deoxy-2'-fluoro-N,2'-dimethylcytidine

(2'R)-2'-Deoxy-N-(ethoxycarbonyl)-2'-fluoro-2'-methylcytidine

(2'R)-2'-Deoxy-2'-fluoro-N-(4-methoxybenzoyl)-2'-methylcytidine