1,3-Diphenyl-5-pyrazolone 1,3-Diphenylpyrazolone 2-Pyrazolin-5-one, 1,3-diphenyl- (8CI) 3H-Pyrazol-3-one, 2,4-dihydro-2,5-diphenyl- 4845-49-2 5-Pyrazolone, 1,3-diphenyl- AI3-16510 EINECS 225-430-8 NSC 59778