1. Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Innovative Drug Research Center, School of Pharmaceutical Sciences, Chongqing University, 401331 Chongqing, P. R. China
2. Pharmaceutical Department, Chongqing University Three Gorges Hospital, Chongqing University, 404100 Chongqing, P. R. China
3. Chemical Biology Research Center, School of Pharmaceutical Sciences, Chongqing University, 401331 Chongqing, China
4. Beijing National Laboratory for Molecular Sciences, 100190 Beijing, China