1. Beijing National Laboratory for Molecular Sciences; Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
2. School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
3. Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, P. R. China
4. School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, P. R. China