1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2,3-dideoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-2-fluoro-β-D-threo-pentofuranosyl]-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2,3-dideoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-2-fluoro-β-D-threo-pentofuranosyl]-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-(2,3-dideoxy-2-fluoro-β-D-threo-pentofuranosyl)-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-D-threo-pentofuranosyl]-9H-purin-6-yl]imidodicarbonate

2-Chloro-9-[2,3-dideoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-D-threo-pentofuranosyl]-9H-purin-6-amine

2-Chloro-9-[2-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-3-O-(1H-imidazol-1-ylthioxomethyl)-β-D-arabinofuranosyl]-9H-purin-6-amine

Adenosine, 2-chloro-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-3′-C-methyl-, 2′,3′-diacetate

Adenosine, 2-chloro-N,N-bis[(1,1-dimethylethoxy)carbonyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-3′-C-methyl-, 2′,3′-diacetate

Adenosine, 2-chloro-N,N-bis[(1,1-dimethylethoxy)carbonyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-3′-C-methyl-, 2′,3′-diacetate

Adenosine, 2-chloro-N,N-bis[(1,1-dimethylethoxy)carbonyl]-3′-C-methyl-, 2′,3′-diacetate

Adenosine, 2-chloro-N,N-bis[(1,1-dimethylethoxy)carbonyl]-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-C-methyl-, 2′,3′-diacetate

Adenosine, 2-chloro-5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-C-methyl-, 2′,3′-diacetate

2-Chloro-9-[2-deoxy-5-O-[1,1-dicarboxy-2-(2,3,4-trifluorophenyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

9-[5-O-[1-Carboxy-2-[2-(4-morpholinyl)ethoxy]-2-oxo-1-[[3-(trifluoromethoxy)phenyl]methyl]ethyl]-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-2-chloro-9H-purin-6-amine

2-Chloro-9-[2-deoxy-2-fluoro-5-O-[1-[[2-(4-morpholinyl)ethoxy]carbonyl]-2-oxo-2-(phenylmethoxy)-1-[[3-(trifluoromethoxy)phenyl]methyl]ethyl]-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]-2-fluoro-5-O-[1-[[2-(4-morpholinyl)ethoxy]carbonyl]-2-oxo-2-(phenylmethoxy)-1-[[3-(trifluoromethoxy)phenyl]methyl]ethyl]-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-2-fluoro-5-O-[(1S)-1-[[2-(4-morpholinyl)ethoxy]carbonyl]-2-oxo-2-(phenylmethoxy)ethyl]-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

2-Chloro-9-[2-deoxy-5-O-[1,1-dicarboxy-2-(3,4-dichlorophenyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-9-[2-deoxy-5-O-[1,1-dicarboxy-2-(2-fluorophenyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-9-[2-deoxy-5-O-[1,1-dicarboxy-2-(4-chloro-2,6-difluorophenyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine