1. Computational Chemistry and Molecular Biophysics Section, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224, United States
2. Designer Drug Research Unit, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224, United States
3. Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, Queen’s Medical Centre, University of Nottingham, Nottingham NG7 2UH, U.K.
4. Centre of Membrane Proteins and Receptors, Universities of Birmingham and Nottingham, Midlands NG7 2UH, U.K.
5. Division of Molecular Therapeutics, New York State Psychiatric Institute, New York, New York 10032, United States
6. Department of Molecular Pharmacology and Therapeutics, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York 10032, United States
7. Department of Psychiatry, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York 10032, United States