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. 1999 Dec;62(12):1685-7.
doi: 10.1021/np990230v.

A new vitamin E (alpha-tocomonoenol) from eggs of the Pacific salmon Oncorhynchus keta

Y Yamamoto  1 , N Maita, A Fujisawa, J Takashima, Y Ishii, W C Dunlap
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A new vitamin E (alpha-tocomonoenol) from eggs of the Pacific salmon Oncorhynchus keta

Y Yamamoto et al. J Nat Prod. 1999 Dec.

Abstract

A novel alpha-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 of alpha-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 activities of MDT and alpha-tocopherol were compared in aqueous phosphatidylcholine liposomal suspension and in methanolic solution at 37 degrees C. The antioxidant activity of MDT was found to be identical to that of alpha-tocopherol under the experimental conditions of measurement.

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