2-Azido-9-[5-O-[1-[(3-cyanophenyl)methyl]-2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-9-[2-deoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-[[3-(2H-tetrazol-5-yl)phenyl]methyl]ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

1,1-Dimethylethyl N-[2-azido-9-[5-O-[1-[(3-cyanophenyl)methyl]-2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]carbamate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-[[3-(2H-tetrazol-5-yl)phenyl]methyl]ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

2-Chloro-9-[2-deoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(2H-tetrazol-5-ylmethyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(2H-tetrazol-5-ylmethyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

2-Chloro-9-[2-deoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-1-[[4-(hydroxymethyl)phenyl]methyl]-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[2-ethoxy-1-(ethoxycarbonyl)-1-[[4-(hydroxymethyl)phenyl]methyl]-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-deoxy-5-O-[(1R)-1-(diethoxyphosphinyl)-2-ethoxy-2-oxoethyl]-3-O-[(1,1-dimethylethoxy)carbonyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

4-Amino-1-[2-deoxy-3-O-[dimethyl(1-methylethyl)silyl]-β-D-erythro-pentofuranosyl]-1,3,5-triazin-2(1H)-one

4-Amino-1-[2-deoxy-3-O-(dimethylpropylsilyl)-β-D-erythro-pentofuranosyl]-1,3,5-triazin-2(1H)-one

4-Amino-1-[2-deoxy-3-O-(triethylsilyl)-β-D-erythro-pentofuranosyl]-1,3,5-triazin-2(1H)-one

4-Amino-1-[5-O-(cyclopentyldiethylsilyl)-2-deoxy-β-D-erythro-pentofuranosyl]-1,3,5-triazin-2(1H)-one

4-Amino-1-[5-O-(cyclohexyldimethylsilyl)-2-deoxy-β-D-erythro-pentofuranosyl]-1,3,5-triazin-2(1H)-one

4-Amino-1-[5-O-(cyclopentyldimethylsilyl)-2-deoxy-β-D-erythro-pentofuranosyl]-1,3,5-triazin-2(1H)-one

Uridine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-[(1E)-3-[[2-[4-(2,2-dimethyl-1-oxopropoxy)phenyl]ethyl]amino]-3-oxo-1-propen-1-yl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-5-[(1E)-3-[[2-[4-(2,2-dimethyl-1-oxopropoxy)phenyl]ethyl]amino]-3-oxo-1-propen-1-yl]uridine

Uridine, 5-[(1E)-3-[[2-(acetyloxy)ethyl]amino]-3-oxo-1-propen-1-yl]-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]