1. University of Maryland School of Pharmacy, Department of Pharmaceutical Sciences, 20 N. Pine St., Baltimore, MD 21201, USA
2. Department of Chemistry, Cardiff University, CF10 3AT, UK
3. University of Maryland School of Medicine, 20 S. Greene St., Baltimore, MD 21201, USA
4. University of Maryland Greenebaum Cancer Center, 20 S. Greene St., Baltimore, MD 21201, USA