Abstract
A new tetracyclic triterpenoid compound named as mastichinoic acid A (1) was isolated from Mastich. The structure was established as 3,7-dioxo-11β-hydroxy-5α-tirucalla-8,24(Z)-dien-26-oic acid by various spectroscopic techniques including MS, 1D, and 2D NMR and HRTOFMS.
Acknowledgements
This work was financially supported by National Natural Science Foundation (U1170302), Key Projects of the National Science and Technology Pillar Program (2011BAZ02590) and SCI-TECH R&D Program of Shihezi University (ZRKX2009ZD05).