1. R&D Laboratories, Department of Self‑Medication, Taisho Pharmaceutical Co., Ltd., Saitama, Saitama 331‑9530, Japan
2. Department of Biochemistry, Tokyo University of Pharmacy and Life Sciences, Tokyo 192‑0392, Japan
3. Department of Bioscience and Biotechnology, Fukui Prefectural University, Eiheiji, Fukui 910‑1195, Japan