2,5-Cyclohexadien-1-one, 4-(3,5-dimethyl-4-oxo-2,5-cyclohexadien-1-ylidene)-2,6-dimethyl- 3,3',5,5'-Tetramethyl-4,4'-diphenoquinone 3,3',5,5'-Tetramethyldiphenoquinone 3,3',5,5'-Tetramethyldiphenylquinone 3,3,5,5-Tetramethyldiphenoquinone 4906-22-3 Diphenoquinone, 3,3',5,5'-tetramethyl- NSC93973 Tetramethyldiphenoquinone [Bi-2,5-cyclohexadien-1-ylidene]-4,4'-dione, 3,3',5,5'-tetramethyl-