1. Graduate School of Sciences and Technology for Innovation Yamaguchi University Yamaguchi 753‐8515 Japan
2. Chemistry Laboratory The Jikei University School of Medicine 8‐3‐1 Kokuryo, Chofu, Tokyo 182‐8570 Japan
3. Research Institute for Sustainable Humanosphere (RISH) Kyoto University Uji, Kyoto 611‐0011 Japan
4. Faculty of Applied Biological Sciences Gifu University 1‐1 Yanagido, Gifu City, Gifu 501‐1193 Japan
5. Department of Pharmaceutical Chemistry Kyoto Pharmaceutical University Yamashina‐ku, Kyoto 607‐8414 Japan
6. Department of Research and Development, Hirata Corporation 111 Hitotsugi, Ueki, Kita, Kumamoto‐shi, Kumamoto 861‐0198 Japan
7. Research Center for Thermotolerant Microbial Resources (RCTMR) Yamaguchi University Yamaguchi 753‐8515 Japan