From the wood of Barringtonia acutangula Gaertn a new hexahydroxy triterpene, now named tanginol, is isolated besides β- and γ-sitosterols, barringtogenic acid and an unknown triterpene carboxylic acid (compound D). From a study of several reactions, tanginol is shown to belong to the group of β-amyrins with a 1:2 cis glycol at 6β,7β and a 1:3 glycol at 3β,23 positions. The remaining two hydroxyls are also present as a 1:3 glycol and they are located at 16β,28 from analogy. Tanginol is, therefore, tentatively shown to be 3β,6β,7β,16β,23,28-hexahydroxy olean-Δ¹²-ene.