2,5-Cyclohexadien-1-one, 4,4'-(1,2-diethyl-1,2-ethanediylidene)bis- (9CI) 2,5-Cyclohexadien-1-one, 4,4'-(diethylethanediylidene)di- 4,4'-(Diethylethanediylidene)di-2,5-cyclohexadien-1-one 5664-37-9 BRN 5952518 Diethylstilbestrol quinone Diethylstilbestrol-4',4''-quinone Stilbestrol quinone