2-Chloro-7-(2-deoxy-2-fluoro-β-D-arabinofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-(5-O-Benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-2-chloro-7H-pyrrolo[2,3-d]pyrimidin-4-amine

2-Chloro-7-(3,5-di-O-benzoyl-2-deoxy-2-fluoro-β-D-arabinofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

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

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

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

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

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-(2-chloro-2-deoxy-β-D-arabinofuranosyl)-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-chloro-2-deoxy-3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-9H-purin-6-yl]imidodicarbonate

2-Chloro-3'-deoxy-5'-O-(1,1-dicarboxy-2-phenylethyl)-3'-fluoroadenosine

2-Chloro-3'-deoxy-5'-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-3'-fluoroadenosine

2-Chloro-3'-deoxy-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]-3'-fluoroadenosine

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-(phenylmethyl)ethyl]-3'-fluoroadenosine

2-Chloro-3'-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-5'-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-3'-fluoroadenosine

2-Chloro-3'-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-fluoroadenosine

2-Chloro-3′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-3′-fluoro-5′-O-[(4-methoxyphenyl)diphenylmethyl]adenosine

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[2-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-[(4-methoxyphenyl)diphenylmethyl]-β-D-xylofuranosyl]-9H-purin-6-yl]imidodicarbonate

1,3-Bis(1,1-dimethylethyl) 2-[9-[3-O-acetyl-2-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-[(4-methoxyphenyl)diphenylmethyl]-β-D-xylofuranosyl]-2-chloro-9H-purin-6-yl]imidodicarbonate

9-[3-O-Acetyl-2-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-[(4-methoxyphenyl)diphenylmethyl]-β-D-xylofuranosyl]-2-chloro-9H-purin-6-amine

9-[2-Azido-2-deoxy-5-O-(1,1-dicarboxy-2-phenylethyl)-β-D-arabinofuranosyl]-2-chloro-9H-purin-6-amine