1. Department of Pharmaceutical Sciences College of Pharmacy University of Tennessee Health Science Center 881 Madison Avenue Memphis TN 38163 USA
2. Department of Medicine University of Tennessee Health Science Center 19 S. Manassas, Room 120 Memphis TN 38103 USA
3. Faculty of Pharmacy Campus de Albacete Universidad de Castilla-La Mancha Avda. Dr. José María Sánchez Ibáñez S/N 02008 Albacete Spain
4. Division of Chemistry and Chemical Engineering California Institute of Technology 1200 E. California Blvd. Pasadena CA 91125 USA
5. Department of Organic Chemistry Faculty of Sciences Universidad de Málaga, Campus de Teatinos 29071 Málaga Spain