3,3,6-trimethyl-3,6-dihydro-7H-pyrazolo[3,4-d]pyridazin-7-one 7H-pyrazolo[3,4-d]pyridazin-7-one, 3,6-dihydro-3,3,6-trimethyl- InChI=1/C8H10N4O/c1-8(2)5-4-9-12(3)7(13)6(5)10-11-8/h4H,1-3H