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-(methylsulfonyl)phenyl]methyl]-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

2-Chloro-9-[2-deoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-1-(2-naphthalenylmethyl)-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-(2-naphthalenylmethyl)-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

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

2-Chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-[[3-(trifluoromethoxy)phenyl]methyl]ethyl]-2-fluoro-β-D-arabinofuranosyl]-N,N-bis[(1,1-dimethylethoxy)carbonyl]-9H-purin-6-amine

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

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

2-Chloro-9-[2-deoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-1,9-dihydro-6H-purin-6-one

2-Chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-2-fluoro-β-D-arabinofuranosyl]-6-(pentyloxy)-9H-purine

2-Chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-6-(pentyloxy)-9H-purine

2-Chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-2-fluoro-β-D-arabinofuranosyl]-6-(pentyloxy)-9H-purine

2-Chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-D-arabinofuranosyl]-6-(pentyloxy)-9H-purine

2-Chloro-9-[2-deoxy-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-D-arabinofuranosyl]-6-(pentyloxy)-9H-purine

2-Chloro-9-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-6-(pentyloxy)-9H-purine

2-Chloro-9-[5-O-[1-[[4-(cyanomethoxy)phenyl]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)-1-[[4-[[(3-methoxy-3-oxopropyl)amino]carbonyl]phenyl]methyl]-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-amine