1. Drug Discovery Unit, Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, 500 Dongchuan Road, Shanghai 200241, P. R. China
2. Navy Medical Research Institute, Second Military Medical University, Shanghai 200433, P. R. China
3. Department of Materials Science, Fudan University, Shanghai 200433, P. R. China
4. Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China