3'-O-[(Hydroxymethoxyphosphinyl)methyl]-5-methyluridine

2'-O-[(Hydroxymethoxyphosphinyl)methyl]-5-methyluridine

3'-Deoxy-2'-O-[(2S)-2-hydroxy-2-phosphonoethyl]-5-methyluridine

2',3'-O-[(1R)-2-(Diethoxyphosphinyl)ethylidene]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyluridine

2',3'-O-[(1R)-2-(Diethoxyphosphinyl)-2-hydroxyethylidene]-5'-O-[(1,1-dimethylethyl)diphenylsilyl]-5-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-deoxy-2'-O-[2-(diethoxyphosphinyl)ethyl]-5-methyluridine

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-3'-deoxy-2'-O-[(2R)-2-(diethoxyphosphinyl)-2-hydroxyethyl]-5-methyluridine

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

N-Benzoyl-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-O-methyladenosine

3'-[[N6-Acetyl-N2-[(1,1-dimethylethoxy)carbonyl]lysyl-O-methyl-L-tyrosyl]amino]-3'-deoxy-N,N-dimethyladenosine

5-[(1E)-3-[[2-[Bis[2-[[5-[(3aS,4S,6aR)-hexahydro-2-oxo-1H-thieno[3,4-d]imidazol-4-yl]-1-oxopentyl]amino]ethyl]amino]ethyl]amino]-3-oxo-1-propen-1-yl]-2'-deoxyuridine

5-Azido-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxyuridine

3'-[[N6-Acetyl-N2-[(1,1-dimethylethoxy)carbonyl]-D-lysyl-O-methyl-L-tyrosyl]amino]-3'-deoxy-N,N-dimethyladenosine

3'-[[N6-Acetyl-N2-[(1,1-dimethylethoxy)carbonyl]-L-lysyl-O-methyl-L-tyrosyl]amino]-3'-deoxy-N,N-dimethyladenosine

6-Thioguanosine monophosphate

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-N-(2-methyl-1-oxopropyl)-2'-O-[(2-nitrophenyl)methyl]-3'-thioguanosine

3'-[[N6-Acetyl-N2-[(phenylmethoxy)carbonyl]lysyl-O-methyl-L-tyrosyl]amino]-3'-deoxy-N,N-dimethyladenosine

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

5'-O-[Bis(4-methoxyphenyl)phenylmethyl]-5-bromouridine

5'-[(Cyclopropylsulfonyl)amino]-5'-deoxyuridine