1. Department of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, Bouvé College of Health Sciences, Center for Drug Discovery, Northeastern University, Boston, Massachusetts 02115, United States
2. Computational Chemistry and Molecular Biophysics Section, National Institutes of Health, Baltimore, Maryland 21224, United States
3. Electrophysiology Research Section, National Institutes of Health, Baltimore, Maryland 21224, United States
4. Designer Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224, United States