1. Department of Medicinal Chemistry and Molecular Pharmacology, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, West Lafayette, IN 47907, USA
2. Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
3. Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
4. Department of Chemistry, Center for Cancer Research, and Institute for Drug Discovery, Purdue University, West Lafayette, IN 47907, USA