1. Department
of Molecular Physiology and Biophysics, Faculty of Medical Sciences, University of Fukui, Fukui 910-1193, Japan
2. Department
of Anesthesiology and Reanimatology, Faculty of Medical Sciences, University of Fukui, Fukui 910-1193, Japan
3. Laboratory
of Aquatic Natural Products Chemistry, Graduate School of Agricultural
and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan