1. State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, People’s Republic of China
2. Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, Medical University of South Carolina, Charleston, South Carolina 29425, United States
3. Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
4. Department of Internal Medicine, Division of Hematology and Oncology, Henry Ford Health System, Detroit, Michigan 48202, United States