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Antioxidative effectiveness and oxidized products in mixture of methyl linoleate(ML) and phenolic compounds were investigated under oxygen blowing at 37 ℃ for 9 days. Caffeic acid (3,4-dihydroxy cinnamate; CML) and phloroglucinol(1,3,5-trihydroxy benzene; PML) showed higher antioxidative effectiveness for methyl linoleate than 0.05% a-tocopherol (TML). Oxidized products in ML group were methyl 8-(2-furyl)-octanoate, 9,13-trans, cis hydroperoxide isomer, 9,13-trans, trans hydroperoxide isomer, and 9-TMSO-12,13-epoxy-l0-octadecenoate. In CML group the oxidized products were methyl8-(2-furyl)-octanoate, 9-trans, cis hydroperoxide isomer and 9-trans, trans hydroperoxide isomer, but 13-hydroxy isomer was not identified. It was shown that that CML were oxidized more slowly than ML group and at 6th day of oxidation, caffeic quinone was found to be major oxidized product of caffeic acid. Oxidixed Products in PML group were methyl-8-(2-furyl)-octanoate, 9-trans, cis hydroperoxide isomer, and 9-traps, traps hydroperoxide isomer, but phloroglucinol was not oxidized even at the 9th day of reaction.
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