1. NMR Science and Development Division, RIKEN SPring-8 Center (RSC), and NMR Facility, CLST, RIKEN, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan
2. Toyo Tire Corporation, 3-10-1 Yato, Kawanishi, Hyogo 666-0131, Japan
3. School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan
4. JST-Mirai Program, Japan Science and Technology Agency, 1-7-22 Suehiro, Tsurumi, Yokohama, Kanagawa 230-0045, Japan