Auto-oxidation products of astaxanthin.

Hideo Etoh, Mika Suhara, Sinji Tokuyama, Hideaki Kato, Rie Nakahigashi, Yasunori Maejima, Masaharu Ishikura, Yukimasa Terada, Takashi Maoka

Graduate School of Science and Technology, Shizuoka University.

Journal of oleo science 2012

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The auto-oxidation products of astaxanthin were investigated. Astaxanthin was allowed to react with atmospheric oxygen at 55°C in the dark for 35 days. A series of oxidative cleavage products, 7-apoastaxanthinal (1), 9-apoastaxanthinone (2), 11-apoastaxanthinal (3), 13-apoastaxanthinone (4), 15-apoastaxanthinal (5), 14'-apoastaxanthinal (6), 12'-apoastaxanthinal (7), 10'-apoastaxanthinal (8), and 8'-apoastaxanthinal (9), were identified. Among them, 3 and 6 were isolated and characterized for the first time. Cleavage of the double bond in astaxanthin was discussed on the basis of the calculation of the stable molecular energy.

Citation

Hideo Etoh, Mika Suhara, Sinji Tokuyama, Hideaki Kato, Rie Nakahigashi, Yasunori Maejima, Masaharu Ishikura, Yukimasa Terada, Takashi Maoka. Auto-oxidation products of astaxanthin. Journal of oleo science. 2012;61(1):17-21