1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
2. School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology of Nature Products, Kunming Medical University, Kunming 650500, China
3. School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan 430000, China
4. State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China