1. Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, School of Pharmacy, School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, P. R. China
2. State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, P. R. China
3. State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China