The work of G.R.M., E.K., C.W., and O.B.T. was supported by the National Institute on Drug Abuse (NIDA) of the National Institutes of Health (NIH) UG3DA048351 and 1DP1DA034787-01, and through a Cooperative Agreement Award (no. W81XWH-07-2-067) between the Henry M. Jackson Foundation (HJF) for the Advancement of Military Medicine and the U.S. Department of Defense (DOD). Material has been reviewed by the Walter Reed Army Institute of Research. There is no objection to its presentation and/or publication. The views expressed here reflect the results of research conducted by the author(s) and do not necessarily reflect the official policy or position of the Defense Health Agency, Department of War, NIH, the U.S. Department of Health and Human Services, U.S. Government, or HJF. This research was supported [in part] by the work done in the Drug Design and Synthesis Section, Molecular Targets and Medications Discovery Branch (MTMDB), and supported by the Intramural Research Programs of the National Institute on Drug Abuse (NIDA) and the National Institute of Alcohol Abuse and Alcoholism (NIAAA) of the National Institutes of Health (NIH). The contributions of the NIH author(s) A.S., A.E.J., and K.C.R. were made as part of their official duties as NIH federal employees, are in compliance with agency policy requirements, and are considered Works of the United States Government.