1. Chemical Genomics Research Group RIKEN Center for Sustainable Resource Science Saitama 351-0198 Japan
2. Seed Compounds Exploratory Unit for Drug Discovery Platform Drug Discovery Platforms Cooperation Division RIKEN Center for Sustainable Resource Science Saitama 351-0198 Japan
3. Department of Biotechnology Graduate School of Agricultural and Life Sciences The University of Tokyo Yayoi Tokyo 113-8657 Japan