Bryocoumaric acid, from the roots of Bryonia dioica, is shown on the basis of chemical and spectroscopic evidence to have the structure 3α-p-hydroxycinnamyloxymultiflora-7,9(11)-dien-29α-oic acid. The structure of the new terpenoid portion, 3α-hydroxymultiflora-7,9(11)-dien-29α-oic acid, is confirmed by correlation with bryonolic acid, 3β-hydroxymultiflor-8-en-29α-oic acid, isolated from the same plant.
P. J. Hylands, E. S. Mansour and M. T. Oskoui, J. Chem. Soc., Perkin Trans. 1, 1980, 2933 DOI: 10.1039/P19800002933
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