Premium
Alkyl‐and alkenylresorcinols in Rapanea laetevirens seed lipids
Author(s) -
Madrigal R. V.,
Spencer G. F.,
Plattner R. D.,
Smith C. R.
Publication year - 1977
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02533646
Subject(s) - alkyl , double bond , chemistry , side chain , mass spectrometry , composition (language) , pigment , lipidology , fatty acid , homologous series , stereochemistry , organic chemistry , chromatography , polymer , linguistics , philosophy
The seed lipids of Rapanea laetevirens (Myrsinacea) were found to contain a series of 5‐alkylresorcinols. Some of these alkylresorcinols have been reported previously in other plant families, but never before in the Myrsinaceae. The various homologs were shown by mass spectrometry to have alkyl side chains that included C 11 and C 13 saturated as well as C 11 , C 13 , and C 15 monoenoic substituents. This is the first report of the natural occurrence of tridecenylresorcinol, the homolog with the C 13 monoenoic side chain. The positions of the double bonds in the side chains were determined by mass spectrometry of their methoxy trimethylsilyloxy derivatives. Also found were embelin and rapanone, benzoquinone pigments which occur commonly in the Myrsinaceae. The fatty acid composition of Rapanea seed triglycerides was not unusual, consisting mainly of 16∶0 (27%), 18∶1 (22%), and 18∶2 (44%).