1. Department
of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1
Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
2. Graduate
School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
3. Faculty
of Education, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan