4-(1,1-Dimethylethyl)-2-[5-(1,1-dimethylethyl)-2,3-dihydro-2-oxo-3-benzofuranyl]phenyl 3,5-bis(1,1-dimethylethyl)-4-hydroxybenzoate, 4-tert-butyl-2-(5-tert-butyl-2-oxo-2,3-dihydro-1-benzofuran-3-yl)phenyl 3,5-di-tert-butyl-4-hydroxybenzoate
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