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Identification of α‐parinaric acid in the seed oil of Sebastiana brasiliensis sprengel (Euphorbiaceae)
Author(s) -
Spitzer Volker,
Tomberg Werner,
Zucolotto Mônica
Publication year - 1996
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02518109
Subject(s) - euphorbiaceae , gas chromatography , fatty acid , chemistry , mass spectrometry , nuclear magnetic resonance spectroscopy , organic chemistry , chromatography , gas chromatography–mass spectrometry , biology , botany
Besides some usual fatty acids, the seed oil of Sabastiana brasiliensis (Euphorbiaceae) contains up to 39% (estimated by ultraviolet spectroscopy) of α‐parinaric acid ( cis, trans, trans, cis ‐9, 11, 13, 15‐octadecatetraenoic acid). The fatty acids were analyzed by gas chromatography and gas chromatography/mass spectrometry as their methyl esters. The structure of α‐parinaric acid was proven by a combination of chemical and spectroscopic methods, conducted with the crude oil, the methyl ester mixture, and the isolated fatty acid methyl ester. Complete assignment of the 1 H and 13 C nuclear magnetic resonance (NMR) shifts of α‐parinaric acid was carried out by two‐dimensional NMR experiments