1. Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, 800 E Leigh Street, Richmond, Virginia23298, United States
2. Department of Pharmacology and Toxicology, Virginia Commonwealth University, 410 North 12th Street, Richmond, Virginia23298, United States
3. Institute for Drug and Alcohol Studies, 203 East Cary Street, Richmond, Virginia23298-0059, United States