1. Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
2. Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
3. Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa-ken, 252-0373, Japan
4. Research Institute of Biological Materials, Keihanna Research Laboratory, Hikaridai 1-7, Seika, Soraku, Kyoto 619-0237, Japan