Bryocoumaric acid, a new triterpene from Bryonia dioica

Abstract
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.