1. Warren Center for Neuroscience Drug Discovery, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
2. Department of Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States
3. Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232, United States
4. Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States