抄録
Two novel antioxidants (vinyl caffeate and trans-p-menth-8-en-7-yl caffeate) and seven known antioxidants (3, 4-dihydroxybenzaldehyde, methyl 3, 4-dihydroxy-benzoate, methyl caffeate, 3', 4', 5, 7-tetrahydroxy-flavone, caffeic acid, 6, 7-dihydroxycoumarin, and rosmarinic acid) were isolated from Perilla frutescens Britton var. crispa (Thunb.). The redox potentials of the novel isolated antioxidative compounds were comparable to those of known antioxidants. trans-p-Menth-8-en-7-yl caffeate was effective to prevent the oxidative degradation of perillaldehyde in the essential oil of P. frutescens.
