A new 28-nor-oleanane triterpene from excoecaria agallocha

Abstract

A new 28-nor-oleanane triterpene, 28-nor-olean-2,3β-dihydroxy-14,17-diene-16-one with a rare cyclohexa-2,5-dienone moiety, together with three known triterpenes, viz. β-amyrin (2), 3α-O-trans-coumaroyl-betulinic acid (3), 3-acetyl-aleuritolic acid (4), were isolated from the twigs of Excoecaria agallocha L.. Their structures were determined by extensive spectroscopic data analysis and comparison with previous literatures (known compounds).