5'-[(N-Acetyl-β-neuraminoyl)amino]-5'-deoxyuridine

5'-[(4-Butylbenzoyl)amino]-5'-deoxyuridine

3'-Azido-2',3'-dideoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-N,N-dimethyladenosine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-4-S-(2-cyanoethyl)-5-fluoro-3'-O-methyl-4-thiouridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-4-S-(2-cyanoethyl)-5-fluoro-2'-O-methyl-4-thiouridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-4-S-(2-cyanoethyl)-5-fluoro-4-thiouridine

6-O-(3-Methoxypropyl)-2'-C-methylguanosine

5'-Guanylic acid, 2',3'-O-[(1S)-3-carboxy-1-methylpropylidene]-, P'-anhydride with 7-methylguanosine 5'-[hydrogen P-(phosphonomethyl)phosphonate] inner salt

5-[[[2-(2,3-Dihydro-2-oxo-1H-benzimidazol-1-yl)ethyl]amino]carbonyl]-2'-O-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-4-S-(2-cyanoethyl)-2',3'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-5-fluoro-4-thiouridine

5-[[[(4-Fluorophenyl)methyl]amino]carbonyl]-2'-O-methyluridine

5'-Guanylic acid, 2',3'-O-[(1S)-3-carboxy-1-methylpropylidene]-, P'-anhydride with N,N,7-trimethylguanosine 5'-[hydrogen P-(phosphonomethyl)phosphonate] inner salt

3',5'-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-formyl-2'-O-methyluridine

3',5'-Bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-(hydroxymethyl)-2'-O-methyluridine

5'-[[Bis(4-fluorophenyl)methyl]amino]-2',5'-dideoxyuridine

5-[3-[[6-[[6-[[[6-[[6-(Aminocarbonyl)-3,6,7,8-tetrahydrobenzo[1,2-b:4,3-b']dipyrrol-2-yl]carbonyl]-3,6,7,8-tetrahydrobenzo[1,2-b:4,3-b']dipyrrol-2-yl]carbonyl]amino]-1-oxohexyl]amino]hexyl]amino]-3-oxo-1-propen-1-yl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

5-[6-[1-[(2-Boronophenyl)methyl]-1H-1,2,3-triazol-4-yl]-1-hexyn-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

5-[6-[1-[(3-Boronophenyl)methyl]-1H-1,2,3-triazol-4-yl]-1-hexyn-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

5-[3-[[3-[1-[(2-Boronophenyl)methyl]-1H-1,2,3-triazol-4-yl]-1-oxopropyl]amino]-1-propyn-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

5-[3-[[3-[1-[(3-Boronophenyl)methyl]-1H-1,2,3-triazol-4-yl]-1-oxopropyl]amino]-1-propyn-1-yl]-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)