1. School of Medicine & Holistic Integrative Medicine, Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Nanjing University of Chinese Medicine, Nanjing 210023, China
2. Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
3. State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, P. R. China
4. State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China