1. Department of Pharmacology,
Medical School, University of Minnesota, Minneapolis, Minnesota 55455,
United States
2. Department of Medicinal Chemistry,
College of Pharmacy, University of Minnesota, Minneapolis, Minnesota
55455, United States
3. Department
of Pharmacology and
Toxicology, Virginia Commonwealth University, Richmond, Virginia 23298,
United States
4. Chemical
Biology Research Branch,
National Institute on Drug Abuse and National Institute on Alcohol
Abuse and Alcoholism National Institutes of Health, DHHS, Bethesda,
Maryland 20892, United States