1. Department of Chemistry, Chemistry of Life Processes Institute, Center for Molecular Innovation and Drug Discovery, and Center for Developmental Therapeutics, Northwestern University, Evanston, Illinois 60208, United States
2. Department of Molecular Biosciences, Northwestern University, Evanston, Illinois 60208, United States
3. Department of Chemistry and Biochemistry, Loyola University Chicago, Chicago, Illinois 60660, United States
4. Department of Pharmacology, Northwestern University, Chicago, Illinois 60611, United States