1. Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, United States
2. Department of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
3. Masonic Cancer Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
4. Department of Veterinary Population Medicine, University of Minnesota, St. Paul, Minnesota 55108, United States
5. Department of Pharmacology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, United States