1. Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
2. University of Chinese Academy of Sciences Beijing 100049 China
3. Collaborative Research Institute for Innovative Microbiology The University of Tokyo 1-1-1 Yayoi, Bunkyo-ku Tokyo 113-8657 Japan
4. PRESTO Japan Science and Technology Agency Kawaguchi Saitama 332-0012 Japan
5. Department of Chemistry City University of Hong Kong Tat Chee Avenue Kowloon, Hong Kong SAR China