2',3'-Dideoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-2'-(2-ethoxy-1-hydroxy-1-methyl-2-oxoethyl)-5-methyluridine

1-(2,3-Di-O-acetyl-5-deoxy-β-D-ribofuranosyl)-6-(trifluoromethyl)-1H-benzimidazole

1-(2,3-Di-O-acetyl-5-deoxy-β-D-ribofuranosyl)-5-(trifluoromethyl)-1H-benzimidazole

3'-Deoxy-3'-[4-[[(3-ethyl-4-methyl-2-oxo-2H-1-benzopyran-7-yl)oxy]methyl]-1H-1,2,3-triazol-1-yl]-5-methyluridine

2'-Deoxy-2',2'-difluoro-3'-O-methylcytidine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)dimethylsilyl]-2',2'-difluoro-3'-O-methylcytidine

1-[5-O-[[[[2-(1,3-Dihydro-4-hydroxy-6-methoxy-7-methyl-3-oxo-5-isobenzofuranyl)ethoxy]hydroxyphosphinyl]methyl]hydroxyphosphinyl]-β-D-ribofuranosyl]-4-nitro-1H-benzimidazole

1-[2,3-O-(1-Methylethylidene)-β-D-ribofuranosyl]-4-nitro-1H-benzimidazole

2',5'-Dideoxy-N-[(1,1-dimethylethoxy)carbonyl]-2',2'-difluoro-5'-iodocytidine

2'-Deoxy-5-(2-thienyl)-4-thiouridine

2'-Deoxy-5-(2-furanyl)-4-thiouridine

5-(2-Thienyl)-4-thiouridine

5-(2-Furanyl)-4-thiouridine

5-Chloro-5'-deoxy-2',3'-di-O-methylcytidine

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

5-(2-Furanyl)-3-methyluridine

1H-Benzimidazole, 5,6-dibromo-1-[3,5-O-(mercaptophosphinylidene)-β-D-ribofuranosyl]-

5,6-Dichloro-1-[3,5-O-(mercaptophosphinylidene)-β-D-ribofuranosyl]-1H-benzimidazole

1H-Benzimidazole, 1-[3,5-O-(mercaptophosphinylidene)-β-D-ribofuranosyl]-

1-(5-O-1H-Benzimidazol-2-yl-β-D-ribofuranosyl)-5,6-dichloro-1H-benzimidazole