1-Fenyl-3,5-dioxo-4-(3-oxobutyl)pyrazolidin [Czech] 1-Phenyl-3,5-dioxo-4-(3-oxobutyl)pyrazolidin [German] 1-Phenyl-3,5-dioxo-4-(3-oxobutyl)pyrazolidine 25841-48-9 3,5-Pyrazolidinedione, 4-(3-oxobutyl)-1-phenyl- 4-(3-Oxobutyl)-1-phenyl-3,5-pyrazolidinedione 5-24-09-00131 (Beilstein Handbook Reference) BRN 0889127