1. College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
2. Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China
3. University of Chinese Academy of Sciences, Beijing 100049, P. R. China
4. School of Pharmaceutical Sciences, Chongqing Key Laboratory of Natural Product Synthesis and Drug Research, Chongqing University, Chongqing 401331, P. R. China
5. Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P. R. China