1. College of Pharmaceutical Science, Soochow University, Suzhou 215123, 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 20277, Taiwan;
4. Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 201203, China