1,6-dimethyl-1,5-dihydro-4H-pyrazolo[3,4-d]pyrimidin-4-one 4H-pyrazolo[3,4-d]pyrimidin-4-one, 1,5-dihydro-1,6-dimethyl- InChI=1/C7H8N4O/c1-4-9-6-5(7(12)10-4)3-8-11(6)2/h3H,1-2H3,(H,9,10,12