1. Laboratory of Synthetic Organic Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
2. School of Pharmaceutical Sciences, Wakayama Medical University, Wakayama 640-8156, Japan
3. Laboratory of Neuropathology and Neuroscience, Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan
4. JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan