1. Research
Center for Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, People’s Republic of China
2. Natural
Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina 27599, United States
3. Chinese
Medicine Research and Development Center, China Medical University and Hospital, Taichung 401, Taiwan, ROC