Occurrence of conjugated fatty acids in the seed oil of couepia longipendula (chrysobalanaceae)

Abstract

The seeds of Couepia longipendula contain 74.2% oil. Gas chromatography (GC) and gas chromatography/ mass spectrometry (GC/MS) of the methyl esters and oxazoline derivatives of the fatty acids and ultraviolet (UV), infrared (IR),1H-nuclear magnetic resonance (NMR) and13C-NMR spectra of the oil showed the presence of palmitic (25.2%), palmitoleic (0.9%), stearic (6.2%), oleic (26.5%), vaccenic (0.4%), linoleic (7.4%), arachidic (0.3%), α-eleostearic (11.3%) and α-licanic (21.8%) acids. Licanic acid methyl ester was isolated by thin-layer chromatography (TLC) and the13C-NMR and1H-NMR data are presented. © 1990 American Oil Chemists' Society.