(BI-2,5-CYCLOHEXADIEN-1-YLIDENE)-4,4'-DIONE 2,5-Cyclohexadien-1-one, 4-(4-oxo-2,5-cyclohexadien-1-ylidene)- (9CI) 4,4'-Biphenyldione 4,4'-Diphenoquinone 4-07-00-02472 (Beilstein Handbook Reference) 494-72-4 BRN 2043852 Diphenoquinone