5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-2'-[methyl(1-pyrenylmethyl)amino]-2-thiouridine

6-S-(2-Cyanoethyl)-2'-deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-N-(2-phenoxyacetyl)-6-thioguanosine

2'-O-[2-[(Aminocarbonyl)amino]cyclohexyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-5-methyluridine

Glycine, N-(1-oxo-2-propylpentyl)-, 5'-ester with 5-fluorouridine

3'-O-(2-Methoxycyclohexyl)-5-methyluridine

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

2'-Deoxy-2'-fluoro-5'-O-(hydroxymercaptophosphinyl)-P-thiouridylyl-(3'→5')-adenylyl-(3'→5')-2'-O,4'-C-methyleneadenylyl-(3'→5')-2'-O-methyl-P-thiouridylyl-(3'→5')-2'-O,4'-C-methyleneadenylyl-(3'→5')-2'-O-methyl-P-thiouridylyl-(3'→5')-2'-O,4'-C-methyleneadenosine

Benzimidazole, 5,6-dichloro-1-ribofuranosyl-

2'-Deoxy-2'-fluoro-5'-O-(hydroxymercaptophosphinyl)cytidylyl-(3'→5')-2'-O-methyl-P-thiocytidylyl-(3'→5')-2'-O,4'-C-methyleneadenylyl-(3'→5')-2'-O-methyl-P-thiouridylyl-(3'→5')-cytidylyl-(3'→5')-2'-O,4'-C-methylene-P-thiouridylyl-(3'→5')-2'-O-methylcytidine

5'-O-[(1,1-Dimethylethyl)dimethylsilyl]-8-methyladenosine

2'-Deoxy-4'-C-ethyl-5-iodouridine

2'-Deoxy-5-iodo-4'-C-methyluridine

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

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

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

2'-Deoxy-5-iodo-4'-C-methylcytidine

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

2'-Deoxy-4'-C-ethyl-5-iodocytidine

4-S-[2-[[3-[(2-Bromoacetyl)amino]phenyl]amino]-2-oxoethyl]-4-thiouridine

4-S-[2-[[4-[(2-Bromoacetyl)amino]phenyl]amino]-2-oxoethyl]-4-thiouridine