3-[2-Deoxy-3-O-(1,4-dioxopentyl)-2-fluoro-β-D-ribofuranosyl]-3H-[1,2,4]triazolo[5,1-i]purine

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-2-fluoro-β-D-ribofuranosyl]-3H-[1,2,4]triazolo[5,1-i]purine

3-(2-Deoxy-2-fluoro-β-D-ribofuranosyl)-3H-[1,2,4]triazolo[5,1-i]purine

3-[2-Deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-fluoro-β-D-ribofuranosyl]-3H-[1,2,4]triazolo[5,1-i]purine

6-Chloro-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-2-fluoro-β-D-ribofuranosyl]-9H-purine

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-3H-[1,2,4]triazolo[5,1-i]purine

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-3H-[1,2,4]triazolo[5,1-i]purine