1. Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Centre for Research and Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, China
2. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
3. School of Life Sciences, Yunnan University, Kunming, 650091, China