サメ肝油のグリセリル・エーテル
1971 年 37 巻 2 号 p. 111-118
詳細
1971 年 37 巻 2 号 p. 111-118
The glyceryl ethers of the liver oils of Triakis scyllia, Squalus acanthias, Apristurus macrorhinchus, Centroscyllium ritteri, Centrophorus spp. and Cetorhinus maximus were separated from the unsaponifiable fraction by silicic acid chromatography. The contents of glyceryl ethers in the unsaponifiable materials (or in the liver oils, respectively) were, in the same order of species, 24% (2%), 85% (11%), 51% (6%), 18% (10%), 9% (7%) and 1 (0.4%). The compositions of the glyceryl ethers and total fatty acids were determined by gas-liquid chromatography, as the isopropylidene and methyl ester derivatives, respectively. The glyceryl ethers of Triakis and Cetorhinus were more saturated than those of the other liver oils. Besides chimyl, batyl and selachyl alcohols (the last named is the principal component and constituted about 50% of Squalus, Apristurus, Centroscyllium and Centrophorus glyceryl ethers), tetradecyl, hexadecenyl and eicosenyl glyceryl ethers were the major components. Odd-numbered, branched and diunsaturated chains were present in only small amounts.
No direct interrelationship between the fatty acids and the alkyl moieties of the glyceryl ethers was observed, but most probably the two are related indirectly, with a selective con-version of the fatty acids to the corresponding long-chain alcohols occurring, followed by biosynthesis of the glyceryl ethers from the latter.
