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

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

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

2-Chloro-9-[2-deoxy-5-O-(1,1-dicarboxy-2-phenylethyl)-2-fluoro-β-D-arabinofuranosyl]-6-(pentylthio)-9H-purine

9-[5-O-[1-Carboxy-2-ethoxy-2-oxo-1-(phenylmethyl)ethyl]-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-2-chloro-6-(pentylthio)-9H-purine

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

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-(pentylthio)-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-(pentylthio)-9H-purine

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

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

2-Chloro-9-(2-deoxy-2-fluoro-β-D-arabinofuranosyl)-6-(pentylthio)-9H-purine

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

2-Chloro-3′-deoxy-5′-O-[1,1-dicarboxy-2-[4-(phenylmethoxy)phenyl]ethyl]adenosine

2-Chloro-3′-deoxy-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-[[4-(phenylmethoxy)phenyl]methyl]ethyl]adenosine

2-Chloro-3′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-[[4-(phenylmethoxy)phenyl]methyl]ethyl]adenosine

2-Chloro-3′-deoxy-5′-O-[1,1-dicarboxy-2-(4-carboxyphenyl)ethyl]adenosine

2-Chloro-3′-deoxy-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-1-[[4-(methoxycarbonyl)phenyl]methyl]-2-oxoethyl]adenosine

2-Chloro-3′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-1-[[4-(methoxycarbonyl)phenyl]methyl]-2-oxoethyl]adenosine