1-[5-O-(Aminosulfonyl)-2-deoxy-α-L-threo-pentofuranosyl]-3-[(2-fluoro-4-methylphenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-α-L-threo-pentofuranosyl]-3-(2-naphthalenylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-α-L-threo-pentofuranosyl]-3-(trifluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(4-methyl-2-thiazolyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(3,4-dimethoxyphenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

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

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(3-methylphenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(benzo[b]thien-2-ylmethyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(6-fluoro-2,3-dihydro-1H-inden-5-yl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(cyclopropylmethyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(2,3-dihydro-1,4-benzodioxin-6-yl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-(methylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(3-methoxyphenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[[3-(trifluoromethoxy)phenyl]thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[[4-(trifluoromethoxy)phenyl]thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(3,4-dimethylphenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

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

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-(2-pyridinylthio)-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-[(4-methylphenyl)thio]-1H-pyrazolo[3,4-d]pyrimidin-4-amine

1-[5-O-(Aminosulfonyl)-2-deoxy-β-D-erythro-pentofuranosyl]-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine