Über die Fettsäuren der Leberphosphatide und des Leberöls von Etmopterus spinax (Ordnung: Selachii). (6. Mitteilung über Phosphatide.)

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Abstract
The mixture of phosphatides obtained from the livers of E. spinax was similar to the liver phosphatides of the higher vertebrates. Both are characterized by their large content of the high molecular fatty acids of the C20 and C23 groups, principally arachidonic (C20H22O2) and clupanodonic (C22H34O2) acids. The amt. of saturated fatty acids is small and mostly palmitic acid. The livers of both [male][male] and [female][female] yield about 80% of oil and this contains 27-36% of fatty acids and 0.697-0.775% of glycerine; from which it is obvious that only a small part of the fatty acids exist in the liver as glycerides. Most of them are esters of the higher alcohols which with the squalenes form the bulk of the unsaponifiable portion. The fatty acid mixture contained the following groups in % of the total fatty acids: C14 1%, C16 21%, C18 27%, C20 13%, C22. 31%, C24 7%. The acids of the C18-C24 groups belong chiefly to the oleic acid series.

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