1. Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, School of Chemistry and Molecular EngineeringEast China Normal University Shanghai 200062 China
2. Departments of Biological Sciences and BioengineeringLehigh University Bethlehem Pennsylvania 18015
3. State Key Laboratory of Drug ResearchShanghai Institute of Materia Medica, Chinese Academy of Sciences 555 Zuchongzhi Road, Shanghai, 201203 China
4. Department of Biochemistry and Molecular Biology and Department of ChemistryUniversity of Chicago Chicago Illinois 60637
5. Department of ChemistryUniversity of Illinois at Chicago Chicago Illinois 60607