Occurrence of conjugated fatty acids in the seed oil of<i>couepia longipendula</i> (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), 1 H‐nuclear magnetic resonance (NMR) and 13 C‐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 the 13 C‐NMR and 1 H‐NMR data are presented.