1. Department of Medicinal Chemistry, University of Michigan, 428 Church St., Ann Arbor,
Michigan 48109-1065, United States
2. exeResearch LLC, 32 University Drive,
East Lansing, Michigan 48823, United States
3. Center for Structural Biology, University of Michigan, 3358E Life Sciences Institute,
210 Washtenaw Ave., Ann Arbor, Michigan 48109-2216, United States