1. Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
2. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
3. School of Pharmacy, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
4. Affiliated Hospital, The Third People’s Hospital of Chengdu, Southwest Jiaotong University, Chengdu 610000, P. R. China