1. State Key Laboratory of Phytochemistry & Plant Resources in West China, Institute of Botany, Chinese Academy of Sciences, Kunming 650201, PR China
2. School of Chemical Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
3. Yunnan Key Laboratory of Natural Medicinal Chemistry, Institute of Botany, Chinese Academy of Sciences, Kunming 650201, PR China