1. Department of Chemistry, Vanderbilt Ingram Cancer Center, and Vanderbilt Center for Structural Biology, Vanderbilt University, Nashville, Tennessee 37235, United States
2. Department of Biochemistry, School of Medicine, Vanderbilt Ingram Cancer Center, and Vanderbilt Center for Structural Biology, Vanderbilt University, Nashville, Tennessee 37232, United States
3. Department of Chemistry and Biochemistry, Concordia University, Montréal, Québec H4B 1R6, Canada
4. Department of Pharmaceutical Sciences, University of California, Irvine, California 92697, United States