1. Roy and Diana Vagelos Laboratories, Department of ChemistryUniversity of Pennsylvania 231 South 34th Street Philadelphia, Pennsylvania 19104-6323 USA
2. Department of ChemistryVirginia Commonwealth University 1001 West Main Street, P.O. Box 842006 Richmond, Virginia 23284 USA
3. Medicines for All InstituteVirginia Commonwealth University, Biotech 8 737 North Fifth Street Richmond, Virginia 23219 USA
4. State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan University Changsha 41000 People's Republic of China