1. Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, Yunnan Characteristic Plant Extraction Laboratory, School of Chemical Science and Technology, Yunnan University, Kunming, 650500, P. R. China
2. Key Laboratory of Herbal-Tebitan Drug Screening and Deep Processing of Gansu Province, School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China
3. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, P. R. China