1. Institute of Pharmaceutical Sciences, Hiroshima University Faculty of Medicine, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan, Faculty of Agriculture, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Nakagami-gun, Okinawa 903-0129, Japan, University Forest, Faculty of Agriculture, University of the Ryukyus, 685 Aza Yona, Kunigami-son, Kunigami-gun, Okinawa 905-1427, Japan, Medicinal Chemistry Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10 Kagasuno, Kawauchi-cho, Tokushima 771-0192,...