3'-Deoxy-3'-[[(2S)-4-carboxy-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxobutyl]amino]-N,N-dimethyladenosine

3'-Deoxy-3'-[[(2S)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-(methylsulfonyl)-1-oxobutyl]amino]-N,N-dimethyladenosine

3'-Deoxy-3'-[[(2S)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-(methylsulfinyl)-1-oxobutyl]amino]-N,N-dimethyladenosine

3'-Deoxy-3'-[[2-[[(1,1-dimethylethoxy)carbonyl]amino]-4-(hydroxymethylphosphinyl)-1-oxobutyl]amino]-N,N-dimethyladenosine

3'-[[(2S)-5-Amino-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1,5-dioxopentyl]amino]-3'-deoxy-N,N-dimethyladenosine

3'-Deoxy-3'-[[[(2S)-tetrahydro-5-oxo-2-furanyl]carbonyl]amino]-N,N-dimethyladenosine

3'-Deoxy-3'-[[(2S)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-5-methoxy-1,5-dioxopentyl]amino]-N,N-dimethyladenosine

3'-[[(2S)-2-Amino-4-(methylsulfonyl)-1-oxobutyl]amino]-3'-deoxy-N,N-dimethyladenosine

3'-[[(2S)-2-Amino-4-(methylsulfinyl)-1-oxobutyl]amino]-3'-deoxy-N,N-dimethyladenosine

3'-[[2-Amino-4-(hydroxymethylphosphinyl)-1-oxobutyl]amino]-3'-deoxy-N,N-dimethyladenosine

3'-Deoxy-3'-[[(2S)-2,5-diamino-1,5-dioxopentyl]amino]-N,N-dimethyladenosine

3'-Deoxy-3'-[[(2S)-4-carboxy-2-hydroxy-1-oxobutyl]amino]-N,N-dimethyladenosine

3'-Deoxy-2',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-4'-C-(2,2-dimethyl-1-oxopropoxy)-3'-iodoadenosine

4'-C-(Acetyloxy)-3'-deoxy-2',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-iodoadenosine

4'-C-(Benzoyloxy)-3'-deoxy-2',5'-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-iodoadenosine

3-[2-[2-(2-Hydroxyethoxy)ethoxy]ethyl]-2'-O-methyluridine

3-[2-[2-[2-[Bis(4-methoxyphenyl)phenylmethoxy]ethoxy]ethoxy]ethyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-O-methyluridine

(2'R)-2'-Deoxy-2'-fluoro-2'-methyluridine 5'-(trihydrogen diphosphate)

(2'R)-2'-Deoxy-2'-fluoro-2'-methyluridine 5'-(tetrahydrogen triphosphate)

5'-O-[(1,1-Dimethylethyl)dimethylsilyl]-3'-O-(ethoxymethyl)-2'-O-methyluridine