1. Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, Florida 33620, United States
2. Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
3. School of Pharmaceutical Sciences, Institute of Drug Discovery and Development, Key Laboratory of Advanced Pharmaceutical Technology (Ministry of Education), Zhengzhou University, Zhengzhou 450001, PR China