1. Ralph N. Adams Institute for Bioanalytical Chemistry and Department of Chemistry, University of Kansas, Multidisciplinary Research Building, 2030 Becker Drive, Room 220 E, Lawrence, Kansas 66047, Department of Medicinal Chemistry, 1251 Wescoe Hall Drive, University of Kansas, Lawrence, Kansas 66045, and Department of Environmental and Biomolecular Systems, OGI School of Science and Engineering at Oregon Health and Science University, Beaverton, Oregon 97006-8921