| Abstract
| - A novel α-tocomonoenol [3,4-dihydro-2,5,7,8-tetramethyl-2-(4,8,12-trimethyl-12-tridecenyl)-2H-1-benzopyran-6-ol] having an unusual methylene unsaturation at the isoprenoid-chain terminus ofα-tocopherol was isolated from the lipophilic fraction of chum salmon eggs. The structure of this marine-derived tocopherol (MDT) was established by spectral analyses. The peroxyl radical-trapping activitiesof MDT and α-tocopherol were compared in aqueous phosphatidylcholine liposomal suspension and inmethanolic solution at 37 °C. The antioxidant activity of MDT was found to be identical to that ofα-tocopherol under the experimental conditions of measurement.
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