5'-O-[2-(2-Acetylhydrazinyl)-2-oxo-1-phosphonoethyl]-2-chloroadenosine

5'-O-(Carboxyphosphonomethyl)-N-methyladenosine

5,6-Dichloro-1-[5-O-[(1R)-2-ethoxy-2-oxo-1-phosphonoethyl]-β-D-ribofuranosyl]-1H-benzimidazole

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-3'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-fluoro-5-methyluridine

5,6-Dichloro-1-[5-O-[(1S)-2-ethoxy-2-oxo-1-phosphonoethyl]-β-D-ribofuranosyl]-1H-benzimidazole

3-[(4-Azido-2-nitrophenyl)methyl]-2'-deoxyuridine

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

2',3'-O-(Dibutylstannylene)-5-methyluridine

5-[[[2-(3-Benzofuranyl)ethyl]amino]carbonyl]-2'-deoxy-2'-fluorouridine

5-[[[2-(3-Benzofuranyl)ethyl]amino]carbonyl]-2'-O-methyluridine

L-Phenylalanine, N-(trifluoroacetyl)-, 5'-ester with 5-fluorouridine

(2'R)-4'-C-(Azidomethyl)-2'-deoxy-2'-fluoro-2'-methyladenosine

5-[2-[10-[2-(2-Amino-4-pyridinyl)ethynyl]-9-anthracenyl]ethynyl]-2'-deoxyuridine

5-[[(2-Benzo[b]thien-3-ylethyl)amino]carbonyl]-2'-deoxy-2'-fluorouridine

5-[[(2-Benzo[b]thien-3-ylethyl)amino]carbonyl]-2'-O-methyluridine

4'-C-(Azidomethyl)-2'-deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoro-5-iodouridine

3'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-6-O-ethyl-3'-fluoro-4'-C-fluoro-N-[(4-methoxyphenyl)diphenylmethyl]-2'-C-methylguanosine

3'-Deoxy-3'-fluoro-4'-C-fluoro-2'-C-methylcytidine

3'-Deoxy-3'-fluoro-4'-C-fluoro-2'-C-methyluridine

3',5'-Dideoxy-3'-fluoro-4'-C-fluoro-5'-iodo-2'-C-methyluridine