1. Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 2A Nanwei Road, Xicheng District, Beijing 100050, P. R. China
2. School of Pharmaceutical Sciences, Tsinghua University, Haidian District, Beijing 100084, P. R. China
3. College of Pharmacy and Health Science, St. John’s University, Queens, New York, New York 11439, United States
4. College of Integrated Chinese and Western Medicine, Hebei Medical University, Shijiazhuang, Hebei 050017, China
5. Center of Drug Discovery, State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing 210009, P. R. China