2-Chloro-N-[(1S)-1-(4-fluorophenyl)ethyl]-7-[5-O-[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

2-Chloro-7-[5-O-[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]-β-D-ribofuranosyl]-4-(1-pyrrolidinyl)-7H-pyrrolo[2,3-d]pyrimidine

6-Chloro-N-[(1S)-1-(4-fluorophenyl)ethyl]-1-[5-O-[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]-β-D-ribofuranosyl]-1H-pyrazolo[3,4-b]pyridin-4-amine

6-Chloro-N-[(1R)-1-(4-fluorophenyl)ethyl]-1-[5-O-[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

6-Chloro-N-[(1S)-1-(4-fluorophenyl)ethyl]-1-[5-O-[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

6-Chloro-1-[5-O-[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]-β-D-ribofuranosyl]-N-[(1S)-1-phenylethyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

2-Chloro-7-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-4-(1-pyrrolidinyl)-7H-pyrrolo[2,3-d]pyrimidine

2-Chloro-N-[(1S)-1-(3-fluorophenyl)ethyl]-7-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

2-Chloro-N-[(1S)-1-(2-fluorophenyl)ethyl]-7-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-amine

6-Chloro-N-[(1S)-1-(2-fluorophenyl)ethyl]-1-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-b]pyridin-4-amine

6-Chloro-N-cyclopentyl-1-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-b]pyridin-4-amine

6-Chloro-N-[(1S)-1-(3-fluorophenyl)ethyl]-1-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-b]pyridin-4-amine