5-Chloro-2'-deoxy-2',2'-difluorouridine

5-Bromo-2'-deoxy-2',2'-difluorouridine

2',3'-Dideoxy-3'-[(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)oxy]-Adenosine

5-(3-Amino-1-propen-1-yl)-2'-deoxy-2'-fluorouridine

5-(3-Amino-1-propen-1-yl)-2'-deoxy-2'-fluorocytidine

2'-Deoxy-N-[1,4-dioxo-4-[(2-oxoethyl)amino]butyl]-2',2'-difluorocytidine

2'-Deoxy-N-[4-[(2,2-diethoxyethyl)amino]-1,4-dioxobutyl]-2',2'-difluorocytidine

2',3',5'-Tris-O-[(1,1-dimethylethyl)dimethylsilyl]-8-iodoadenosine

2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-8-iodoadenosine

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

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

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

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

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

5'-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-[Bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-8-ethynyladenosine

5-[(2E)-2-Bromoethenyl]-2'-deoxy-2'-fluorouridine

2',3'-Dideoxy-1,6-dihydro-1-methylinosine

5-[(2E)-2-Bromoethenyl]-2',3'-dideoxy-3'-fluorouridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-deoxy-3'-fluorouridine