1. Department of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences at Kagawa Campus, Tokushima Bunri University, and CREST, Japan Science and Technology Agency (JST), 1314-1 Shido, Sanuki, Kagawa 769-2193, Japan, and Department of Chemistry, Faculty of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan