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Constituents of Vitamin E Concentrates from Rice-and Wheat-Germ Oils


THE pioneer work of Evans and his collaborators on the anti-sterility factor (vitamin E) has culminated in the isolation from the unsaponifiable fraction of wheat-germ1 and cotton-seed2 oils of three apparently isomeric oily alcohols α -, -β and -γtocopherol of approximate formula C29H50O2, all of which show high vitamin E activity. The use of the unsaponifiable fraction of rice-germ oil as a source of vitamin E was advocated by Kimm3, who later4 prepared from a purified concentrate a β-naphthoate, m.p. 156°, which yielded on hydrolysis a product alleged to have very high vitamin E activity.

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TODD, A., BERGEL, F., WALDMANN, H. et al. Constituents of Vitamin E Concentrates from Rice-and Wheat-Germ Oils. Nature 140, 361–362 (1937).

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