1. Department of Medicinal Chemistry, University of Minnesota, 2231 Sixth Street SE, Minneapolis, Minnesota 55455, United States
2. Department of Chemistry, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
3. Department of Biomedical Sciences, State University of New York at Albany School of Public Health, Albany, New York 12144, United States
4. The Arbovirus Laboratory, Wadsworth Center, New York State Department of Health, Slingerlands, New York 12201, United States