1. Gunma University Initiative for Advanced Research (GIAR)—International Open Laboratory with Institute Charles Gerhardt Montpellier (UMR5253 CNRS-UM-ENSCM), Gunma University, Kiryu 376-8515, Japan
2. Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Japan
3. Institut Charles Gerhardt Montpellier, UMR 5253, CNRS-UM-ENSCM, 8 rue de l’Ecole Normale, 34296 Montpellier, Cedex 05, France