1. Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Yoshida-Hommachi, Sakyo-ku, Kyoto 606-8501, Japan, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, 2-3-10 Kannda-Surugadai, Chiyoda-ku, Tokyo, 101-0062, Japan, and Center of Excellence Program for Frontier Research on Molecular Destruction and Reconstruction of Tooth and Bone, Tokyo Medical and Dental University, Japan