1. NMR Facility, Center for Life Science Technologies, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
2. Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
3. Faculty of Science and Technology, Department of Applied Chemistry and Bioscience, Chitose Institute of Science and Technology, 65-758 Bibi, Chitose, Hokkaido 066-8655, Japan