2,4,6-tritert-butyl-4-hydroxycyclohexa-2,5-dien-1-one

succinic acid bis-(1,3,5-tri-tert-butyl-4-oxo-cyclohexa-2,5-dienyl ester)

dibenzyl maleate

富马酸苄酯

methyl 3,4,5-triphenylpyrazole-4-carboxylate