New tropical seed oils. Part I. conjugated trienoic and tetraenoic acids and their oxo derivatives in the seed oils of Chrysobalanus Icaco and Parinarium Laurinum

Abstract

The seed oils from Chrysobalanus icaco and Parinarium laurinum contain the following acids (% wt.): palmitic (4,4), stearic (18,7), oleic (11,2), linoleic (6,2), arachidic (1,0), conjugated octadecadienoic (0,1), α-eleostearic (22,22), α-parinaric (10,62), α-licanic (10,0) and a hitherto unknown acid (18,0) which is proved to be 4-oxo-octadeca-cis-9, trans-11, trans-13, cis-15-tetraenoic acid. α-Parinaric acid from both these sources is the cis-9, trans-11, trans-13, cis-15 isomer.