6-S-[(6-Chloro-2-oxo-2H-1-benzopyran-3-yl)methyl]-8-(methylthio)-6-thioguanosine

8-(Methylthio)-6-S-[(2-oxo-2H-1-benzopyran-3-yl)methyl]-6-thioguanosine

8-[(1-Naphthalenylmethyl)thio]-6-thioguanosine

8-[(Phenylmethyl)thio]-6-thioguanosine

6-S-[(6-Chloro-2-oxo-2H-1-benzopyran-3-yl)methyl]-8-[(phenylmethyl)thio]-6-thioguanosine

6-S-[(2-Oxo-2H-1-benzopyran-3-yl)methyl]-8-[(phenylmethyl)thio]-6-thioguanosine

6-S-[(6-Methoxy-2-oxo-2H-1-benzopyran-3-yl)methyl]-8-(methylthio)-6-thioguanosine

6-S-[(6-Methoxy-2-oxo-2H-1-benzopyran-3-yl)methyl]-8-[(phenylmethyl)thio]-6-thioguanosine

6-S-[(6-Bromo-2-oxo-2H-1-benzopyran-3-yl)methyl]-8-[(phenylmethyl)thio]-6-thioguanosine

3'-[[(2S)-2-(Acetylamino)-3-(4-methoxyphenyl)-1-oxopropyl]amino]-3'-deoxy-N,N-dimethyladenosine

8-[(1-Naphthalenylmethyl)thio]-6-S-[(2-oxo-2H-1-benzopyran-3-yl)methyl]-6-thioguanosine

4'-C-Fluoro-5-(hydroxymethyl)-2-thiouridine 5'-(trihydrogen diphosphate)

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-3-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-4-nitro-1H-benzotriazole

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-β-D-ribofuranosyl]-4-nitro-1H-benzotriazole

2'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-iodocytidine

2'-Deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-N-[2-[4-(1,1-dimethylethyl)phenoxy]acetyl]-5-iodocytidine

2'-Deoxy-N-[(dimethylamino)methylene]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-iodocytidine

N-Benzoyl-2'-deoxy-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-iodocytidine

Methyl 1-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-3-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-1H-benzotriazole-4-carboxylate

Methyl 1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)-1H-benzotriazole-4-carboxylate