1. Department of Chemistry, Faculty of Science, Mahidol University, Rama VI Rd, Phyathai, Bangkok 10400, Thailand, Unité Mixte CNRS-bioMérieux, UMR-2714, Ecole Normale Supérieure de Lyon, 46 allée d'Italie, 69364 Lyon, France, and Department of Pathobiology, Faculty of Science, Mahidol University, Rama VI Rd, Phyathai, Bangkok 10400, Thailand