1,2-Diphenyl-4-isopropyl-3-methoxy-3-pyrazolin-5-one 3-Methoxy-4-isopropyl-1,2-diphenyl-5-pyrazolone 3-Pyrazolin-5-one, 1,2-diphenyl-4-isopropyl-3-methoxy- 5-25-01-00041 (Beilstein Handbook Reference) 52213-76-0 BRN 0681680