1. State Key Laboratory of Plant Diversity and Specialty Crops & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Program for Natural Product Chemical Biology, Guangzhou 510650, China
2. South China National Botanical Garden, Guangzhou 510650, P. R. China
3. Graduate University of Chinese Academy of Sciences, Beijing 100049, P. R. China
4. Visiting Student from the Department of Chemistry, University of Wisconsin–Madison, USA
5. Guangzhou Leader Biotechnology Co., LTD, Guangzhou, 510650, China