1,2-Diphenyl-4-(2-(p-ethylbenzoyl)ethyl)-3,5-pyrazolidinedione 20567-54-8 3,5-Pyrazolidinedione, 1,2-diphenyl-4-(2-(p-ethylbenzoyl)ethyl)- 5-24-09-00316 (Beilstein Handbook Reference) BRN 0583389