1,2-Diphenyl-3,5-dioxo-4-aethylpyrazolidin [German] 1,2-Diphenyl-4-ethyl-3,5-pyrazolidinedione 14845-06-8 3,5-Pyrazolidinedione, 1,2-diphenyl-4-ethyl- 5-24-05-00344 (Beilstein Handbook Reference) BRN 0263751 G 15138