N,N'-bis(3,5-ditert-butyl-2-hydroxyphenyl)oxamide

2,4-di-tert-butyl-6-(methylimino)cyclohexa-2,4-dien-1-one

2,4-di-tert-butyl-6,6-bis(dimethylamino)cyclohexa-2,4-dien-1-one

3,5-ditert-butyloxepine-2,7-dione