3'-[(2-Aminoethyl)dithio]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2',3'-dideoxyuridine

(2'R)-2',3'-Dideoxy-2'-fluoro-2'-methylcytidine

5-(31-Azido-5-oxo-8,11,14,17,20,23,26,29-octaoxa-4-azahentriacont-1-yn-1-yl)-2',3'-dideoxyuridine 5'-(tetrahydrogen triphosphate)

5-(19-Azido-5-oxo-8,11,14,17-tetraoxa-4-azanonadec-1-en-1-yl)-2'-deoxyuridine 5'-(tetrahydrogen triphosphate)

5-(2-Benzofuranyl)-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

5,6-Dimethyl 1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-1H-benzimidazole-5,6-dicarboxylate

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-de(phosphinicooxy)-5-methyl-2'-O,4'-C-methyleneuridylylimino(1-oxo-1,2-ethanediyl)-(3'→5')-5-methyl-2'-O-methyl-5'-thiouridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-de(phosphinicooxy)-5-methyl-2'-O,4'-C-methyleneuridylylimino(1-oxo-1,2-ethanediyl)-(3'→5')-3'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-2'-O-methyl-5'-thiouridine

5'-S-(Carboxymethyl)-3'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyl-2'-O-methyl-5'-thiouridine

3'-O-[(1,1-Dimethylethyl)diphenylsilyl]-5'-S-(2-ethoxy-2-oxoethyl)-5-methyl-2'-O-methyl-5'-thiouridine

2'-Deoxy-2',2'-difluoro-4'-C-methylcytidine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-O-(2-methoxyphenyl)-5-methyluridine

5-(5-Azido-1-pentyn-1-yl)-2'-deoxyuridine

2'-O-[2-[(6-Azido-1-oxohexyl)amino]ethyl]-5-methyluridine

2'-O-(2-Azidoethyl)-5-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-4-O-(4-chlorophenyl)-2'-O-methyluridine

5-[(1E)-3-Amino-3-oxo-1-propen-1-yl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

3'-O-Benzoyl-5'-O-[(4-methoxyphenyl)diphenylmethyl]-P-[2-(4-nitrophenyl)ethyl]-N-(phenylmethyl)adenylyl-(2'→5')-2',3'-anhydro-N-benzoyladenosine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-[(3-carboxy-1-oxopropyl)amino]-2'-deoxyuridine

2'-[(4-Amino-1,4-dioxobutyl)amino]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine