1. Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66047, United States
2. Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas 77843, United States
3. Division of Hematology/Oncology, Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California 90095, United States
4. Computation Chemical Biology Core and Molecular Graphics and Modeling Laboratory, University of Kansas, Lawrence, Kansas 66047, United States