Kazuya NISHIO, Sang-Woo KIM, Kentaro KAWAI, Tsunehiro MIZUSHIMA, Takashi YAMANE, Jun HMAZAKI, Shigeo MURATA, Keiji TANAKA and Yukio MORIMOTO* Kyoto University Research Reactor Institute, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 73-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, The Tokyo Metropolitan Institute of Medical Science (Rinshoken), 18-22,Honkomagome 3-chome, Bunkyo-ku, Tokyo 113-8613, Japan