1. Department of Medicinal Chemistry, University of Utah, Salt Lake City, Utah 84112, Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, TR-06100 Ankara, Turkey, Marine Science Institute, University of the Philippines, Diliman, Quezon City 1101, Philippines, Wyeth-Ayerst Research, Pearl River, New York 10965, and Queensland Centre for Biodiversity, Queensland Museum, P.O. Box 3300, South Brisbane, QLD, 4101 Australia