2'-Deoxy-3',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-6-S-[(1E)-3-oxo-3-(2-pyridinyl)-1-propen-1-yl]-6-thioguanosine

(2'R)-2'-Deoxy-2'-fluoro-2'-(fluoromethyl)-6-S-(1-methylethyl)-6-thioguanosine

(2'R)-2'-Deoxy-6-S-ethyl-2'-fluoro-2'-(fluoromethyl)-6-thioguanosine

3-[(2E)-3,7-Dimethyl-2,6-octadien-1-yl]-5-methyluridine

1-[3,5-Bis-O-(phenylmethyl)-α-D-ribofuranosyl]-5,6-dimethyl-1H-benzimidazole

3-[(2E,6E)-3,7,11-Trimethyl-2,6,10-dodecatrien-1-yl]-5-methyluridine

7-Nitro-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-1H-benzimidazole

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-deoxy-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-5-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-O-[(1,1-dimethylethyl)dimethylsilyl]-5-methyluridine

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

5'-O-[4,5-Dihydro-2-oxido-4-[(phenylmethoxy)carbonyl]-1,3,2-thiazaphosphepin-2(3H)-yl]-2'-C-methyl-6-O-methylguanosine

5'-O-[(2S,4S)-4-[(Cyclopentyloxy)carbonyl]-4,5-dihydro-2-oxido-1,3,2-benzothiazaphosphepin-2(3H)-yl]-2'-C-methyl-6-O-methylguanosine

5'-O-[4-[(Cyclopentyloxy)carbonyl]-4,5-dihydro-2-oxido-1,3,2-benzothiazaphosphepin-2(3H)-yl]-2'-C-methyl-6-O-methylguanosine

N-[(1S)-2-(2-Benzothiazolylthio)-1-methylethyl]-2-chloroadenosine

N-[(1R)-2-(2-Benzothiazolylthio)-1-methylethyl]-2-chloroadenosine

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

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-S-[(2E)-3,7-dimethyl-2,6-octadien-1-yl]-2-thiouridine

5'-O-[(2R,4S)-4-[(Cyclopentyloxy)carbonyl]-4,5-dihydro-2-oxido-1,3,2-benzothiazaphosphepin-2(3H)-yl]-2'-C-methyl-6-O-methylguanosine

2'-Amino-2'-deoxy-2'-C-methyladenosine

2'-Azido-2'-deoxy-2'-C-methyladenosine