The Occurrence of Diesters of 2,3-Dihydroxyoctadecane in the Preen Gland of Green Pheasant

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Abstract
Evidence is presented here for the first time that diol waxes in the preen gland of the green pheasant were composed mainly of diesters of 2, 3-dihydroxyoctadecane. The structures of such long chain diols were determined as follows: the samples were converted to corresponding hydrocarbons through p-toluenesulfonyl derivatives and preparation of isopropylidene derivatives and periodate oxidation were carried out. The reaction products were analyzed by gas chromatography or by combined gas chromatography-mass spectrometry. The constituent fatty acids were determined to be lauric, n-tridecanoic, myristic, n-pentadecanoic, palmitic, n-heptadecanoic and stearic acids. Diol waxes of the domestic hen, on the other hand, were reconfirmed to consist of diesters of 2, 3-dihydroxy-docosane, -tricosane and -tetracosane in addition to several minor homologues.

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