2-Chloro-9-[2-deoxy-2-fluoro-5-O-[(1S)-2-(methylamino)-2-oxo-1-phosphonoethyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-9-[2-deoxy-2-fluoro-5-O-[(1R)-2-(methylamino)-2-oxo-1-phosphonoethyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

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

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-deoxy-5-O-[[(S)-carboxy(dimethoxyphosphinyl)]methyl]-3-O-[(1,1-dimethylethoxy)carbonyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

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

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

2-Chloro-9-[2-deoxy-5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-2-fluoro-β-D-arabinofuranosyl]-N-(phenylmethyl)-9H-purin-6-amine

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

1,1-Dimethylethyl N-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]-N-(phenylmethyl)carbamate

1,1-Dimethylethyl N-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]-N-(phenylmethyl)carbamate

1,1-Dimethylethyl N-[2-chloro-9-[2-deoxy-3-O-[(1,1-dimethylethoxy)carbonyl]-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]carbamate

2-Chloro-9-[2-deoxy-5-O-[3-ethoxy-1,1-bis(ethoxycarbonyl)-3-oxopropyl]-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-[3-ethoxy-1,1-bis(ethoxycarbonyl)-3-oxopropyl]-2-fluoro-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

9-[5-O-[1,1-Bis(ethoxycarbonyl)-5-hydroxypentyl]-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-2-chloro-9H-purin-6-amine