2-Chloro-9-[5-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]-β-D-xylofuranosyl]-9H-purin-6-amine

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

1,3-Bis(1,1-dimethylethyl) 2-[2-chloro-9-[3-O-[(1,1-dimethylethoxy)carbonyl]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-xylofuranosyl]-9H-purin-6-yl]imidodicarbonate

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

2′-Amino-2-chloro-2′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]adenosine

2′-Azido-2-chloro-2′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxo-1-(phenylmethyl)ethyl]adenosine

2′-Azido-2-chloro-2′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-5′-O-[2-ethoxy-1-(ethoxycarbonyl)-2-oxoethyl]adenosine

2′-Azido-2-chloro-2′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]adenosine

2′-Azido-2-chloro-2′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]adenosine

2′-Azido-2-chloro-2′-deoxy-3′,5′-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]adenosine

2-Chloro-9-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-2-O-[(trifluoromethyl)sulfonyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-9-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-arabinofuranosyl]-9H-purin-6-amine

2-Chloro-9-[3,5-O-[1,1,3,3-tetrakis(1-methylethyl)-1,3-disiloxanediyl]-β-D-erythro-pentofuranos-2-ulosyl]-9H-purin-6-amine

3′-Amino-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]adenosine

3′-Azido-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]adenosine

3′-Azido-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]adenosine

3′-Azido-2-chloro-3′-deoxy-N,N-bis[(1,1-dimethylethoxy)carbonyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]adenosine

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