1. Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education Yunnan Provincial Center for Research & Development of Natural Products School of Chemical Science and Technology Yunnan University Kunming 650091 P. R. China
2. Key Laboratory of Functional Molecules Analysis and Biotransformation of Universities in Yunnan Province Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education School of Chemical Science and Technology Yunnan University Kunming 650091 P. R. China
3. School of Life Yunnan University Kunming 650091 P. R. China
4. The First People's Hospital of Yunnan Province Kunming 650034 P. R. China