3,5-Pyrazolidinedione, 4-((2,3-dimethyl-3-oxo-1-phenyl-4-pyrazolinyl)a minomethylene)-1,2-diphenyl-

4-[(2,3-Dihydro-1,5-dimethyl-3-oxo-2-phenyl-1H-pyrazol-4-yl)aminomethylene]-1,2-diphenyl-3,5-pyrazolidinedione