1. Department of Pharmaceutical Chemistry, College of Pharmacy, Rutgers-The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey 08854-8087, Department of Pharmacology, University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School, 675 Hoes Lane, Piscataway, New Jersey 08854-5635, and The Cancer Institute of New Jersey, New Brunswick, New Jersey 08901