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

4,6-di-tert-butyl-1,2,3-trimethyl-2,3-dihydro-1H-benzo[d][1,2,3]triazole

5,7-di-tert-butyl-2,3-dimethyl-2,3-dihydrobenzo[e][1,4,2,3]dioxadiazine