Abstract
A lignan and two aromatic compounds were isolated from the branches of the mangrove plant, Bruguiera gymnorrhiza. They were brugunin A (1), bruguierol D (2) and 2,3-dimethoxy-5-propylphenol (3). Among them, 1 and 2 were new compounds; 3 was isolated from a natural source for the first time. The structures of these compounds were determined by NMR spectroscopic studies as well as chemical evidence.
Acknowledgements
This work was funded by National Marine 863 Project (No.2001AA620403, 2002AA217081) and National Natural Science Foundation of China (No.29932030, 30171106), as well as the German Federal Ministry for Education and Research (BMBF; 0312849A and CHN 02/322).