1. Screening Technologies Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick, Maryland, Australian Institute of Marine Science, PMB 3, Townsville Mail Center, Queensland 4810, Australia, Molecular Targets Development Program, Center for Cancer Research, National Cancer Institute, Building 1052, Room 121, Frederick, Maryland, Natural Products Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis,...