Synonyms: 2,6-Ditert-butyl-4-(3,5-ditert-butyl-4-hydroxybenzylidene)-2,5-cyclohexadien-1-one;2,6-Di-tert-butyl-4-(3,5-di-tert-butyl-4-hydroxybenzylidene)-2,5-cyclohexadiene-1-one;4-(3,5-Di-tert-butyl-4-hydroxybenzylidene)-2,6-di-tert-butyl-2,5-cyclohexadiene-1-one;4-(4-Hydroxy-3,5-di-tert-butylbenzylidene)-2,6-di-tert-butyl-2,5-cyclohexadiene-1-one