1. Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan, Department of Natural Science, Osaka Women's University, Sakai, Osaka 590-0035, Japan, JASRI-the SPring-8, Koto 1-1, Hyogo 679-5198, Japan, and Department of Physics Faculty of Science, Okayama University Tsushima-naka, Okayama 700-8530, Japan