1,5-cyclohexadiene-1-carbonitrile, 3-bromo-3,5-bis(1,1-dimethylethyl)-4-oxo- 3-bromo-3,5-di-tert-butyl-4-oxocyclohexa-1,5-diene-1-carbonitrile InChI=1/C15H20BrNO/c1-13(2,3)11-7-10(9-17)8-15(16,12(11)18)14(4,5)6/h7-8H,1-6H