1. Department of Chemistry, Shiga University of Medical Science, Seta, Otsu 520-2192, Japan
2. Department of Clinical Laboratory Medicine, Shiga University of Medical Science, Seta, Otsu 520-2192, Japan
3. Organic Chemical Company, Daicel Chemical Industries, Ltd., 2-1-4 Higashisakae, Ohtake, Hiroshima 739-0605, Japan
4. Immunology Frontier Research Center, Osaka University, 3-1 Yamadaoka, Suita 565-0871, Japan
5. PRESTO, JST, 4-1-8, Honcho, Kawaguchi-shi, Saitama, 332-0012, Japan
6. Biomedical MR Science Center, Shiga University of Medical Science, Seta, Otsu 520-2192, Japan