A C20 homolog of vernolic acid has been found at the 50% level inAlchornea cordifolia, Euphorbiaceae, seed oil. This new acid, (+)cis-14,15-epoxy-cis-11-eicosenoic (alchornoic) acid, was isolated by high-pressure liquid chromotography and characterized by mass spectrometry, nuclear magnetic resonance and infrared spectroscopy, optical rotary dispersion, and ozonolysis-gas-chromotography.
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Kleiman et al. (1977) studied this question.
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