1. Center for Marine Natural Products and Drug Discovery, School of Earth and Environmental Sciences, Seoul National University, NS-80, Seoul, 151-747, Korea, Research Institute of Oceanography, Seoul National University, NS-80, Seoul, 151-747, Korea, College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon, 540-950, Korea, College of Pharmacy, Yeungnam University, 214-1 Dae-dong, Gyeongsan, 712-749, Korea, and Queensland Museum, P.O. Box 3300,...