1. Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan, Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065, Japan, Genomic Sciences Center, RIKEN, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan, JEOL DATUM LTD, 1156 Nakagami-cho, Akishima, Tokyo 196-0022, Japan, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aramaki-aza...