[1] Tokyo Med Univ, Dept Chem, Shinjuku Ku, Tokyo 1608402, Japan
[2] Kitasato Univ, Sch Sci, Dept Chem, Sagamihara, Kanagawa 2288555, Japan
[3] Tokyo Med Univ, Electron Microscopy Lab, Shinjuku Ku, Tokyo 1608402, Japan
[4] Tokyo Univ Sci, Dept Chem, Shinjuku Ku, Tokyo 1628601, Japan