Carbamic acid, N-[1-[5-O-[1-carboxy-1-(diethoxyphosphinyl)ethyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N-cyclopentyl-, 1,1-dimethylethyl ester

Carbamic acid, N-[6-chloro-1-[5-O-[1-(diethoxyphosphinyl)-1-methyl-2-(methylthio)ethyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N-cyclopentyl-, 1,1-dimethylethyl ester

Carbamic acid, N-[6-chloro-1-[5-O-[1-(diethoxyphosphinyl)-2-mercapto-1-methylethyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N-cyclopentyl-, 1,1-dimethylethyl ester

Carbamic acid, N-[1-[5-O-[2-(acetylthio)-1-(diethoxyphosphinyl)-1-methylethyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-6-chloro-1H-pyrazolo[3,4-d]pyrimidin-4-yl]-N-cyclopentyl-, 1,1-dimethylethyl ester

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-cyclopentyl-1-[5-O-[2-ethoxy-1-(hydroxymethyl)-2-oxo-1-phosphonoethyl]-β-ribofuranosyl]-

1-[5-O-(1-Carboxy-2-hydroxy-1-phosphonoethyl)-β-ribofuranosyl]-6-chloro-N-cyclopentyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 1-[5-O-[(1R)-2-(carboxymethoxy)-1-(hydroxymethyl)-1-phosphonoethyl]-β-D-ribofuranosyl]-6-chloro-N-cyclopentyl-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 1-[5-O-[(1R)-2-(carboxymethoxy)-1-(hydroxymethyl)-1-phosphonoethyl]-β-L-ribofuranosyl]-6-chloro-N-cyclopentyl-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-cyclopentyl-1-[5-O-[(1R)-2-(2-ethoxy-2-oxoethoxy)-1-(hydroxymethyl)-1-phosphonoethyl]-β-D-ribofuranosyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-cyclopentyl-1-[5-O-[(1R)-2-(2-ethoxy-2-oxoethoxy)-1-(hydroxymethyl)-1-phosphonoethyl]-β-L-ribofuranosyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-1-[5-O-[2-hydroxy-1-(hydroxymethyl)-1-phosphonoethyl]-β-D-ribofuranosyl]-N-[(1R,2R)-2-methylcyclopentyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-cyclopentyl-1-[5-O-[(1R)-2-hydroxy-1-phosphono-1-(2H-tetrazol-5-yl)ethyl]-β-L-ribofuranosyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-cyclopentyl-1-[5-O-[(1R)-2-hydroxy-1-phosphono-1-(2H-tetrazol-5-yl)ethyl]-β-D-ribofuranosyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-1-[5-O-[1-(hydroxymethyl)-1-phosphono-2-(2H-tetrazol-5-yl)ethyl]-β-ribofuranosyl]-N-(1-methylethyl)-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-(cyclopropylmethyl)-1-[5-O-[(1R)-2-hydroxy-1-(methoxymethyl)-1-phosphonoethyl]-β-L-ribofuranosyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-N-(cyclopropylmethyl)-1-[5-O-[(1R)-2-hydroxy-1-(methoxymethyl)-1-phosphonoethyl]-β-D-ribofuranosyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidine-6-methanol, 4-(cyclopentylamino)-1-[5-O-[2-ethoxy-1-(methoxymethyl)-2-oxo-1-phosphonoethyl]-β-ribofuranosyl]-

1H-Pyrazolo[3,4-d]pyrimidine-6-methanol, 4-(cyclopentylamino)-1-[5-O-[1-(methoxymethyl)-1-phosphono-2-(2H-tetrazol-5-yl)ethyl]-β-ribofuranosyl]-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 6-chloro-1-[5-O-[1-(hydroxymethyl)-1-phosphono-2-(2H-tetrazol-5-yl)ethyl]-β-D-ribofuranosyl]-N-[(1R,2S)-2-methylcyclopentyl]-, rel-

1H-Pyrazolo[3,4-d]pyrimidin-4-amine, 1-[5-O-[(1R)-2-carboxy-1-(methoxymethyl)-1-phosphonoethyl]-β-L-ribofuranosyl]-6-chloro-N-cyclopentyl-, rel-