4-ethyl-2,6-di-tert-butyl-4-hydroxy-2,5-cyclohexadienone

3,5-二叔丁基-4-羟基苯甲酸

5-ethyl-2,7-di-tert-butyl-4-oxa-7-(3,5-di-tert-butyl-4-hydroxyphenyl),2,5-cyclohexadienone