1. College of Pharmacy, Oregon State University, Corvallis, Oregon 97331, Laboratory of Tropical Bioorganic Chemistry, University of Panama, Panama City, Republic of Panama, Smithsonian Tropical Research Institute, Balboa, Ancon, Republic of Panama, Instituto de Investigaciones Científicas Avanzados y Sevicios de Alta Tecnología, Centro de Estudios Biomédicos, Clayton, Building 175, P.O. Box 7250, Panama 5, Republic of Panama, and Scripps Institution of Oceanography and Skaggs School of Pharmacy and...