RESUMEN

In this report, we show that the non-conjugated octadecatetraenoic acid found in the oil of the seeds from Ribes nigrum is identical to the C18-polyunsaturated fatty acid previously isolated in a number of fish oils and seed oils. Evidence obtained from mass spectral data of its triazolopyridine derivative clearly indicates the presence of methylene-interrupted double bonds. Comparison with authentic material prepared by chemical synthesis provides further confirmation of the (all-cis)-6,9,12,15-octadecatetraenoic acid structure. The (all-cis)-4,8,12,15-structural arrangement erroneously attributed to this acid in several literature reports is thus definitely ruled out.

Asunto(s)

Ácidos Grasos Insaturados/química , Aceites de Pescado/química , Plantas/química , Isótopos de Carbono , Fenómenos Químicos , Química Física , Cromatografía de Gases , Ácidos Grasos Insaturados/síntesis química , Cromatografía de Gases y Espectrometría de Masas , Espectroscopía de Resonancia Magnética/métodos , Semillas/química