1. Department of Pharmaceutical Sciences and Department of Pharmacology and Toxicology, Division of Medicinal Chemistry, College of Pharmacy, The University of Arizona, Tucson, Arizona 85721, Pharmacology Research Department, Laboratory Research Branch, Gillis W. Long Hansen's Disease Center, Baton Rouge, Louisiana 70894, and Instituto Nacional de Tecnología Agropecuaria, Castelar, Buenos Aires, Argentina