1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(5-nitro-2-pyridinyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(2,5-dimethyl-3-furanyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(2-fluorophenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-cyclopropyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(6-methoxy-2-pyridinyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(3-chlorophenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-methoxy-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[[2-(diethylamino)ethyl]thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-(cyclopentylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(6-methyl-2-pyridinyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[[(1S)-2,2,2-trifluoro-1-methylethyl]thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(2-methyl-3-furanyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-(difluoromethoxy)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[(difluoromethyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-β-D-arabinofuranosyl]-3-[[(3,3-difluorocyclobutyl)methyl]thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-2-fluoro-α-L-xylofuranosyl]-3-(methylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-α-L-lyxofuranosyl]-3-[(1-methylethyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-α-L-lyxofuranosyl]-3-(methylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-β-D-ribofuranosyl]-3-[(methylthio)methyl]-1H-pyrazolo[3,4-d]pyrimidin-4-amine