1. Department
of Medicinal Chemistry, College of Pharmacy, University of Minnesota, Minneapolis, Minnesota 55455, United States
2. Masonic
Cancer Center, University of Minnesota, Minneapolis, Minnesota 55455, United States
3. Meakins-Christie
Laboratories, McGill University, Montreal, Québec, Canada
4. Department
of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, Florida 32610, United States