Abstract

Extraction of the wood of Eugenia crebrinervis has yielded ellagic acid and a triterpenoid fraction composed of a 1 : 1 mixture of asiatic acid and arjunolic acid. Extraction of the wood of Eugenia gustavioides has given a mixture of triterpenoid acids (2.7 % of the dry weight of the wood) of which crategolic acid (c.1%) is the principal constituent; other major constituents are asiatic acid and arjunolic acid, while oleanolic acid, ursolic acid and 2α-hydroxyursolic acid are minor constituents.In both Eugenia species the α-amyrin component occurs with the corresponding β-amyrin analogue giving a mixture separable only with difficulty; use has been made of the previously described chlorination procedure1 to enable comparatively easy isolation of the α-amyrin component.

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