1. Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education; Yunnan Key Laboratory of Research and Development for Natural Products; School of Pharmacy, Yunnan University, Kunming 650500, P. R. China
2. School of Chemical Science and Technology, Yunnan University, Kunming 650500, China
3. Department of Chemistry and the Hong Kong Branch of Chinese National Engineering Research Centre for Tissue Restoration & Reconstruction, The Hong Kong University of Science and Technology (HKUST), Kowloon, 999077 Hong Kong SAR, China
4. Shenzhen Bay Laboratory, Shenzhen 518132, China
5. School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China