Affiliation: | 1. Division of Hygienic Chemistry, Faculty of Pharmacy, Keio University, Minato-ku, Tokyo, Japan;2. Division of Bioorganic and Medicinal Chemistry, Faculty of Pharmacy, Keio University, Minato-ku, Tokyo, Japan;3. Division of Structural Biochemistry, Department of Biochemistry, Jichi Medical University, Shimotsuke-shi, Tochigi-ken, Japan |