cis-5-Monoenoic fatty acids in some chenopodiaceae seed oils

Abstract

Methyl esters from seed oils of four Chenopodiaceae species are unusual in that they contain methyl cis-5-hexadecenoate (4.6-12%) and methyl 5-octadecenoate (1.1-1.2%). There are indications of small amounts of 18:25,9 and 18:35, 9, 12 along with unsaturated acids commonly found in seed oils-oleic (14-21%), linoleic (53-57%) and linolenic (3.5-7.8%). Fatty acid composition of the oils was determined by gas chromatography, and positions of the double bonds were established by application of gas chromatography-mass spectrometry to the methoxylated methyl esters. © 1972 American Oil Chemists' Society.