A Pentacyclic Triterpenoid from Asteracantha longifolia Ness.

摘要

A new pentacyclic triterpenoid 3beta-acetoxyurs-18-ene (4) has been isolated from the aerial parts of Asteracantha longifolia Ness.,alongwith lupeol (1),16-hydroxy-26-methyltheptacosan-2-one (2) and stigmasterol (3).Their structures were elucidated by spectral analysis and chemical studies.