1. Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
2. Department of Chemistry, Indiana University, Bloomington, Indiana 47408, United States
3. Department of Oncology, Wayne State University School of Medicine, Detroit, Michigan 48201, United States
4. Molecular Therapeutics Program, Barbara Ann Karmanos Cancer Institute, 4100 John R, Detroit, Michigan 48201, United States