1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes,
Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, P. R. China
2. Department of Chemistry, Beijing Normal University, Beijing 100050, P. R. China
3. Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, P. R.
China
4. Shanghai Key Laboratory
of Magnetic Resonance, Department of Physics, East China Normal University, Shanghai 200062, P. R. China