5'-[(6-Aminohexyl)amino]-2',5'-dideoxy-5-fluorouridine

5'-[(5-Aminopentyl)amino]-2',5'-dideoxy-5-fluorouridine

5'-[(4-Aminobutyl)amino]-2',5'-dideoxy-5-fluorouridine

5'-[(3-Aminopropyl)amino]-2',5'-dideoxy-5-fluorouridine

2'-Deoxy-2'-[(2,2,2-trifluoroacetyl)amino]-5-methyluridine

5'-[(8-Aminooctyl)amino]-2',5'-dideoxy-5-fluorouridine

O-Propargyl-Puromycin

3'-Deoxy-3'-[[(2S)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-3-[4-(2-propyn-1-yloxy)phenyl]propyl]amino]-N,N-dimethyladenosine

5'-Deoxy-2'-O-(2-methoxyethyl)-5-methyluridine

5'-Deoxy-5'-fluoro-2'-O-(2-methoxyethyl)-5-methyluridine

2'-O-(2-Methoxyethyl)-5-methyl-5'-O-methyluridine

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

2'-O-[2-[[[2-(Dimethylamino)ethylidene]amino]oxy]ethyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyluridine

2'-O-[2-[[[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethyl]amino]oxy]ethyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyluridine

2'-O-[2-[[[2-(1,3-Dihydro-1,3-dioxo-2H-isoindol-2-yl)ethylidene]amino]oxy]ethyl]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyluridine

3'-Amino-N-benzoyl-2',3'-dideoxy-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-5-methylcytidine

3',5'-O-(Dimethylsilylene)-5-methyluridine

(2'R)-N-Benzoyl-2'-deoxy-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoro-2'-methylcytidine

(2'R)-N-Benzoyl-2'-deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2'-fluoro-2'-methylcytidine

3'-Amino-N-benzoyl-2',3'-dideoxycytidine