1. Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
2. Department of Pathology, Yale School of Medicine, New Haven, Connecticut 06520, United States
3. Department of Chemical Biology & Therapeutics, St. Jude Children’s Research Hospital, Memphis, Tennessee 38105, United States
4. Yale Cancer Center, Yale School of Medicine, New Haven, Connecticut 06520, United States
5. Department of Medicinal Chemistry, University of Minnesota, 308 Harvard Street SE, Minneapolis, Minnesota 55455, United States