1. Department of Biotechnology Graduate School of Engineering Osaka University 2‐1 Yamadaoka Suita Osaka 565‐0871 Japan
2. RIKEN Center for Sustainable Resource Science 1‐7‐22 Suehiro‐cho, Tsurumi‐ku Yokohama Kanagawa 230‐0045 Japan
3. Department of Chemistry and Materials Science Tokyo Institute of Technology 2‐12‐1 O‐okayama, Meguro‐ku Tokyo 152‐8551 Japan
4. Graduate School of Agricultural Science Kobe University 1‐1 Rokkodai‐cho, Nada‐ku Kobe Hyogo 657‐8501 Japan
5. Suntory Global Innovation Center Ltd Research Institute 8‐1‐1 Seikadai, Seika‐cho, Soraku‐gun Kyoto 619‐0284 Japan
6. Suntory Foundation for Life Sciences Bioorganic Research Institute 8‐1‐1 Seikadai, Seika‐cho, Soraku‐gun Kyoto 619‐0284 Japan
7. Tokiwa Phytochemical Co., Ltd 158 Kinoko Sakura Chiba 285‐0801 Japan
8. Graduate School of Pharmaceutical Sciences Chiba University 1‐8‐1 Inohana, Chuo‐ku Chiba 260‐8675 Japan
9. School of Pharmacy Iwate Medical University 2‐1‐1 Nishitokuta Yahaba, Iwate 028‐3694 Japan