1. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources
2. School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
3. Guilin 541004
4. People's Republic of China
5. Guangxi Key Laboratory of Special Non-wood Forest Cultivation and Utilization
6. Guangxi Zhuang Autonomous Region Forestry Research Institute
7. Nanning
8. P. R. of China