1. Department of Medicinal Chemistry and Molecular Pharmacology, School of Pharmacy and Pharmacal Sciences, Purdue University, West Lafayette, Indiana 47907, Biological Testing Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, National Institutes of Health, Fairview Center, Suite 205, 1003 West Seventh Street, Frederick, Maryland 21701, and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National...