1. Department of Synthetic Organic Chemistry, The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
2. Department of Materials Science and Engineering, Graduate School of Science and Engineering, Ibaraki University, Hitachi 316-8511, Ibaraki, Japan
3. Department of Reasoning for Intelligence, SANKEN, Osaka University, Japan
4. Artificial Intelligence Research Center, SANKEN, Osaka University, Japan