2'-Deoxy-3'-O-[1-[2-[ethyl[2-[[(6-iodo-2-quinoxalinyl)carbonyl]amino]ethyl]amino]ethoxy]-1-methylethyl]-5-iodouridine

N-Acetyl-2'-O-methylcytidine 5'-(tetrahydrogen triphosphate)

2'-Deoxy-3'-O-[32-ethyl-36-(6-iodo-2-quinoxalinyl)-1-methyl-36-oxo-2,5,8,11,14,17,20,23,26,29-decaoxa-32,35-diazahexatriacont-1-yl]-5-iodouridine

2'-Deoxy-3'-O-[1-[2-[ethyl[2-[[(6-iodo-2-quinoxalinyl)carbonyl]amino]ethyl]amino]ethoxy]ethyl]-5-iodouridine

4'-C-(Chloromethyl)-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-fluorouridine

2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-[[[(1,1-dimethylethyl)dimethylsilyl]oxy]methyl]-2'-fluorouridine

2'-Deoxy-4'-C-ethyl-2'-fluorouridine

2'-Deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-4'-C-ethyl-2'-fluorouridine

2'-Deoxy-2'-fluoro-4'-C-methylcytidine

2'-Deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-fluoro-4'-C-methylcytidine

2'-Deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-fluoro-4'-C-methyluridine

4'-C-(Chloromethyl)-2'-deoxy-2'-fluorouridine

2'-Deoxy-2'-fluoro-4'-C-methyluridine

2'-Deoxy-4'-C-ethenyl-2'-fluorouridine

4'-C-[[Bis(4-methoxyphenyl)phenylmethoxy]methyl]-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-fluorouridine

2'-Deoxy-2'-fluoro-4'-C-methoxycytidine

2',5'-Dideoxy-2'-fluoro-5'-iodo-4'-C-methoxyuridine

2'-Deoxy-2'-fluoro-4'-C-methoxycytidine 5'-(tetrahydrogen triphosphate)

2'-Deoxy-4'-C-ethyl-2'-fluorouridine 5'-(tetrahydrogen triphosphate)

4'-C-Cyclopropyl-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-fluorouridine