2,5-Cyclohexadien-1-one, 2,6-bis(1,1-dimethylethyl)-4-ethylidene- 2,5-Cyclohexadien-1-one, 2,6-di-tert-butyl-4-ethylidene- 2,6-Bis(1,1-dimethylethyl)-4-ethylidene-2,5-cyclohexadiene-1-one 6738-27-8 NSC14452