1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 1-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-4-[[(1S)-1-(4-fluorophenyl)ethyl]amino]-

7H-Pyrrolo[2,3-d]pyrimidin-4-amine, 7-[5-[[[bis[(2-methyl-1-oxopropoxy)methoxy]phosphinyl]methyl]sulfonyl]-5-deoxy-β-D-ribofuranosyl]-2-chloro-N-cyclopentyl-

7H-Pyrrolo[2,3-d]pyrimidin-4-amine, N-cyclopentyl-7-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-2-(trifluoromethyl)-

7H-Pyrrolo[2,3-d]pyrimidin-4-amine, 2-chloro-N-cyclopentyl-7-[5-deoxy-5-[(2-hydroxy-8-methyl-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl)sulfonyl]-β-D-ribofuranosyl]-

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 4-(cyclopentylamino)-1-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 1-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-4-(3,3-difluoro-1-pyrrolidinyl)-

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 1-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-4-[(3,3-difluorocyclobutyl)amino]-

1H-Pyrazolo[3,4-d]pyrimidine-6-carbonitrile, 1-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-4-[[(1R)-1-(4-fluorophenyl)ethyl]amino]-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-cyclopentyl-1-[5-deoxy-5-[(phosphonomethyl)sulfonyl]-β-D-ribofuranosyl]-

7H-Pyrrolo[2,3-d]pyrimidin-4-amine, 2-chloro-N-cyclopentyl-7-[5-deoxy-5-[[8-methyl-2-[[[(1-methylethoxy)carbonyl]oxy]methoxy]-2-oxido-6-oxo-3,5,7-trioxa-2-phosphanon-1-yl]sulfonyl]-β-D-ribofuranosyl]-

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

(2R)-1-[2-Chloro-7-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-7H-pyrrolo[2,3-d]pyrimidin-4-yl]-2-pyrrolidinemethanol

7H-Pyrrolo[2,3-d]pyrimidin-4-amine, 2-chloro-N-cyclopentyl-7-[5-O-[(1,4-dihydro-8-methyl-2-oxido-2H-3,1,2-benzoxazaphosphor-2-yl)methyl]-β-D-ribofuranosyl]-

3-[6-Chloro-1-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-3-azabicyclo[3.1.0]hexane

6-Chloro-N-cyclopentyl-1-[5-O-[[[(2,2-dimethyl-1-oxopropoxy)methoxy]hydroxyphosphinyl]methyl]-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-[[Bis[(2,2-dimethyl-1-oxopropoxy)methoxy]phosphinyl]methyl]-β-D-ribofuranosyl]-6-chloro-N-cyclopentyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[2-[4-(Cyclopentylamino)-1-[5-O-(phosphonomethyl)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-6-yl]ethynyl]cyclopropanol