1. Medicinal Chemistry Section, Molecular Targets and Medications Discovery Branch, National Institute on Drug Abuse─Intramural Research Program, National Institutes of Health, 333 Cassell Drive, Baltimore, Maryland 21224, United States
2. Department of Quantitative and Computational Biology, USC Michelson Center, University of Southern California, Los Angeles, California 90089, United States
3. Department of Chemistry, Bridge Institute, University of Southern California, Los Angeles, California 90089, United States