1. Department of Medicinal Chemistry, The University of Minnesota, Minneapolis, Minnesota 55455, United States
2. Department of Neurology, The University of Minnesota, Minneapolis, Minnesota 55455, United States
3. Department of Neuroscience, The University of Minnesota, Minneapolis, Minnesota 55455, United States
4. Institute of Pharmacy, University of Regensburg, Universitätsstraße 31, 93053 Regensburg, Germany
5. Veterans Administration Medical Center, GRECC, Minneapolis, Minnesota 55417, United States