1,3-Diphenyl-4-(N-piperidinomethylene)-2-pyrazolin-5-one 1,3-Diphenyl-4-(piperidinomethylene)-2-pyrazolin-5-one 2-Pyrazolin-5-one, 1,3-diphenyl-4-(piperidinomethylene)- 5-25-15-00179 (Beilstein Handbook Reference) 5272-54-8 BRN 0763590