15911-15-6 3,4-Dimethyl-6-phenylisoxazolo(3,4-d)pyridazin-7(6H)-one 4-27-00-09356 (Beilstein Handbook Reference) BRN 0017708 ISOXAZOLO(3,4-d)PYRIDAZIN-7(6H)-ONE, 3,4-DIMETHYL-6-PHENYL-