1,2-Diphenyl-4-(3'-oxobutyl)-3,5-dioxopyrazolidine 1,2-Diphenyl-4-(gamma-ketobutyl)-3,5-pyrazolidinedione 3,5-Pyrazolidinedione, 1,2-diphenyl-4-(3-oxobutyl)- 4-(3-Oxobutyl)-1,2-diphenyl-3,5-pyrazolidinedione 5-24-09-00131 (Beilstein Handbook Reference) 853-34-9 BRN 0308507 Chebutan Chepirol Chetazolidin Chetil Copirene EINECS 212-715-7 Hichillos KEBUZONE KPB Kebuzone [INN] Kebuzonum [INN-Latin] Keobutane-jade Ketason Ketazone Ketophenylbutazone Ketophenylbutazonum Pecnon Quebuzona [INN-Spanish] Recheton