1. Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, California 94143, United States
2. Department of Pharmacology, School of Medicine, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina 27514, United States
3. Department of Anatomy, University of California, San Francisco, San Francisco, California 94143, United States
4. National Institute of Mental Health Psychoactive Drug Screening Program, School of Medicine, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina 27514, United States
5. Division of Chemical Biology and Medicinal Chemistry, Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, Chapel Hill, North Carolina 27514, United States