1. Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
2. Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, P.O. Box 842006 Richmond, Virginia 23284-9069, United States
3. Medicines for All Institute, Virginia Commonwealth University, Biotech 8 737 N. fifth Street, Richmond, Virginia 23219-1441 United States