3,6-di-tert-butyl-4,5-dimethoxy-1,2-benzoquinone

2,5-di-tert-butyl-6-hydroxy-3,4,4-trimethoxycyclohexa-2,5-dienone

3,6-ditert-butyl-4-chlorocyclohexa-3,5-diene-1,2-dione

6-tert-Butyl-3,4-dichloro-[1,2]benzoquinone