1,2-Diphenyl-4-(p-hydroxyanilinomethylene)-3,5-pyrazolidinedione 24665-77-8 3,5-Pyrazolidinedione, 1,2-diphenyl-4-(p-hydroxyanilinomethylene)- 5-25-15-00485 (Beilstein Handbook Reference) BRN 0705545