5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2'-O-[(1-docosyl-1H-1,2,3-triazol-4-yl)methyl]-5-methyluridine

3-Benzoyl-5-methyluridine

5'-O-[(1S)-1-(Diethoxyphosphinyl)-2-ethoxy-2-oxoethyl]-3-[(2-methoxyethoxy)methyl]-5-methyluridine

5'-O-[(1R)-1-(Diethoxyphosphinyl)-2-ethoxy-2-oxoethyl]-3-[(2-methoxyethoxy)methyl]-5-methyluridine

3-[(2-Methoxyethoxy)methyl]-5-methyluridine

3'-Azido-6-O-cyclobutyl-2',3'-dideoxyguanosine

5'-O-(4,6-Dihydroxy-4,6-dioxido-1,3,5,2,4,6-trioxatriphosphorinan-2-yl)-5-methyluridine

5,6-Dimethoxy-1-β-D-ribofuranosyl-1H-benzimidazole

2-Ethyl-1-β-D-ribofuranosyl-1H-benzimidazole

3'-O-[(2S)-6,8-Bis(1,1-dimethylethyl)-5-fluoro-2-oxido-4H-1,3,2-benzodioxaphosphorin-2-yl]-2'-deoxy-5-iodouridine

3'-O-[(2R)-6,8-Bis(1,1-dimethylethyl)-5-fluoro-2-oxido-4H-1,3,2-benzodioxaphosphorin-2-yl]-2'-deoxy-5-iodouridine

5'-O-[6,8-Bis(1,1-dimethylethyl)-5-fluoro-2-oxido-4H-1,3,2-benzodioxaphosphorin-2-yl]-2'-deoxy-5-iodouridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2',3'-dideoxy-3'-fluoro-5-iodouridine

4'-C-Azido-2',5'-dideoxy-2'-fluoro-5'-iodouridine

3'-O-[(4-Methoxyphenyl)diphenylmethyl]-2'-O-methyluridine

5'-O-[(1,1-Dimethylethyl)dimethylsilyl]-3'-O-[(4-methoxyphenyl)diphenylmethyl]-2'-O-methyluridine

4'-C-Azido-N-benzoyl-2',5'-dideoxy-2'-fluoro-5'-iodocytidine

N-Benzoyl-2',5'-dideoxy-2'-fluoro-5'-iodocytidine

4'-C-Azido-N-benzoyl-2',5'-dideoxy-2',2'-difluoro-5'-iodocytidine

(2'R)-4'-C-Azido-2',5'-dideoxy-2'-fluoro-5'-iodo-2'-methyluridine