1. Department of Medicinal Chemistry, School of Medicine, Nankai University, 94 Weijin Road, Tianjin 300071, China
2. State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, China
3. Medical Oncology, Cancer Center, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
4. State Key Laboratory of Medicinal Chemical Biology, 94 Weijin Road, Tianjin 300071, China
5. 2011 Project Collaborative Innovation Center for Biotherapy of Ministry of Education, 94 Weijin Road, Tianjin 300071, China