Chemical investigation of ceylonese plants. Part 22. Extractives of Trichadenia zeylanica Thw. (Flacourtiaceae); isolation and structures of six new triterpenoids containing the friedelane skeleton

Abstract

From the bark and wood extracts of Trichadenia zeylanica Thw., six new triterpenoids, namely trichadenic acid A (3α-hydroxyfriedelan-26-oic acid), O-acetyltrichadenic acid A, O-acetyltrichadenic acid B (3β-acetoxyfriedelan-26-oic acid), trichadonic acid (3-oxofriedelan-26-oic acid), trichadenal (3β-hydroxyfriedelan-26-al), and O-acetyl-trichadenal have been isolated, correlated, and identified. The extracts also contained friedelan-3α-yl acetate and β-sitosterol.