Identification of cyclopentenyl fatty acids by 1H and 13C nuclear magnetic resonance |
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Authors: | Pierre Blaise Marie Farines Jacques Soulier |
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Affiliation: | (1) Laboratoire de Chimie Organique des Substances Naturelles, Université F, Avenue de Villeneuve, 66860 Perpignan Cedex, France |
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Abstract: | Gorlic, chaulmoogric and hydnocarpic fatty acids, specific to the seed oil of the genus Hydnocarpus sp. (Flacourtiaceae), are determined only with difficulty by gas chromatography. These fatty acids were isolated in their methyl ester form by a combination of different chromatographic techniques (thin-layer chromatography/Ag+ and high-pressure liquid chromatography). The proton and carbon nuclear magnetic resonance analysis of these fatty acid methyl esters showed some characteristic signals of the cyclopentenyl ring. The presence of these signals in the proton and/or carbon nuclear magnetic resonance spectrum of an oil thus will allow us to confirm the presence of these cyclopentenyl fatty acids in lipids. |
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Keywords: | Chaulmoogric acid Flacourtiaceae gorlic acid 1H and 13C NMR HPLC hydnocarpic acid Hydnocarpus seed oil identification TLC/Ag+ 2D NMR |
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