1. Department of Medicinal Chemistry and Pharmacognosy (M/C 781), College of Pharmacy, University of Illinois at Chicago, 833 South Wood Street, Chicago, Illinois 60612-7231, Department of Surgical Oncology (M/C 820), College of Medicine, University of Illinois at Chicago, 840 South Wood Street, Chicago, Illinois 60612, and Center for Pharmaceutical Biotechnology (M/C 870), College of Pharmacy, University of Illinois at Chicago, 900 South Ashland Avenue, Chicago, Illinois 60612