9H-Imidazo[1,2-a]purin-9-one, 3-[2-O-[[[(1S,2R,3R)-3-(6-chloro-9H-purin-9-yl)-2-(hydroxymethyl)cyclobutyl]methoxy]mercaptophosphinyl]-3-deoxy-3-fluoro-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-

9H-Imidazo[1,2-a]purin-9-one, 3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-O-[[[(1S,2R,3R)-3-(6-chloro-9H-purin-9-yl)-2-[(triphenylmethoxy)methyl]cyclobutyl]methoxy]mercaptophosphinyl]-3-deoxy-3-fluoro-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-3-deoxy-3-fluoro-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-9H-imidazo[1,2-a]purin-9-one

3-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-deoxy-3-fluoro-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-9H-imidazo[1,2-a]purin-9-one

3-(2,5-Di-O-benzoyl-3-deoxy-3-fluoro-β-D-ribofuranosyl)-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-9H-imidazo[1,2-a]purin-9-one

3-(2,5-Di-O-benzoyl-3-deoxy-3-fluoro-β-D-ribofuranosyl)-3,4-dihydro-9H-imidazo[1,2-a]purin-9-one

6-Chloro-9-(2,5-di-O-benzoyl-3-deoxy-3-fluoro-β-D-ribofuranosyl)-9H-purin-2-amine

9H-Imidazo[1,2-a]purin-9-one, 3-[2-O-[(1,1-dimethylethyl)dimethylsilyl]-3,5-bis-O-(hydroxymercaptophosphinyl)-β-D-ribofuranosyl]-3,5-dihydro-, cyclic diester with (1S,2R,3R)-3-(6-amino-9H-purin-9-yl)-1,2-cyclobutanedimethanol

9H-Imidazo[1,2-a]purin-9-one, 3-[3-O-[(2-cyanoethoxy)hydroxyphosphinothioyl]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-(hydroxymercaptophosphinyl)-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-, cyclic diester with (1S,2R,3R)-3-(6-chloro-9H-purin-9-yl)-1,2-cyclobutanedimethanol

9H-Imidazo[1,2-a]purin-9-one, 3-[3-O-[[[(1S,2R,3R)-3-(6-chloro-9H-purin-9-yl)-2-(hydroxymethyl)cyclobutyl]methoxy](2-cyanoethoxy)phosphinothioyl]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-

9H-Imidazo[1,2-a]purin-9-one, 3-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[[(1S,2R,3R)-3-(6-chloro-9H-purin-9-yl)-2-[(triphenylmethoxy)methyl]cyclobutyl]methoxy](2-cyanoethoxy)phosphinothioyl]-2-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-ribofuranosyl]-3,5-dihydro-5-[2-(4-nitrophenyl)ethyl]-

9H-Imidazo[1,2-a]purin-9-one, 3-[3,5-bis-O-[(R)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-3,5-dihydro-, cyclic diester with (1S,2R,3R)-3-(6-amino-9H-purin-9-yl)-1,2-cyclobutanedimethanol

9H-Imidazo[1,2-a]purin-9-one, 3,5-dihydro-3-[5-O-[(R)-hydroxymercaptophosphinyl]-3-O-[(S)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-, cyclic diester with (1S,2R,3R)-3-(6-amino-9H-purin-9-yl)-1,2-cyclobutanedimethanol

9H-Imidazo[1,2-a]purin-9-one, 3-[3,5-bis-O-[(S)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-3,5-dihydro-, cyclic diester with (1S,2R,3R)-3-(6-amino-9H-purin-9-yl)-1,2-cyclobutanedimethanol

9H-Imidazo[1,2-a]purin-9-one, 3,5-dihydro-3-[3-O-[(R)-hydroxymercaptophosphinyl]-5-O-[(S)-hydroxymercaptophosphinyl]-β-D-ribofuranosyl]-, cyclic diester with (1S,2R,3R)-3-(6-amino-9H-purin-9-yl)-1,2-cyclobutanedimethanol