(20R,23E)-Eupha-8,23-diene-3β,25-diol from Tripetalum cymosum
摘要:
A new euphane triterpenoid, (20R,23E)-eupha-8,23-diene-3 beta,25-diol, was isolated from the leaves of Tripetalum cymosum and its structure was determined by spectral analysis and chemical correlation with euphol. Caryophyllene oxide, friedelin, euphol and putranjivic acid were also obtained from the leaves whilst the bark afforded euphol, glutin-5-en-3 beta-ol, butyrospermol and dammara-20,24-dien-3 beta-ol. (C) 1999 Elsevier Science Ltd. All rights reserved.