Triterpenoids from the Bark of <i>Avicennia marina</i>

Abstract

Avicennia marina, commonly known as the grey mangrove, is distributed widely along the coast of New South Wales. It is used as a source of tannin in some countries and the very hard timber is used occasionally in boat-building. The bark has now been examined for neutral and acid constituents and was found to contain betulic acid (0 -3 %), taraxerol (0 -06 %), and taraxerone (0.05 %).