1. Key Laboratory of Medicinal Chemistry for Natural Resource
2. Ministry of Education
3. School of Chemical Science and Technology
4. Yunnan University
5. Kunming
6. Department of Chemistry
7. University of Pennsylvania
8. Philadelphia
9. USA
10. School of Chemistry & Environment
11. Yunnan Minzu University
12. P. R. China
13. State Key Laboratory for Phytochemistry and Plant Resources in West China
14. Kunming Institute of Botany
15. Chinese Academy of Science