Laboratory of Medicinal Chemistry;
Faculty of Pharmacy;
Takasaki University of Health and Welfare;
Takasaki;
Japan;
Laboratory of Natural Medicines;
Faculty of Pharmaceutical Sciences;
Sojo University;
Kumamoto;
Japan;
Laboratory of Organic Chemistry for Life Sciences;
Faculty of Pharmacy;
Takasaki University of Health and Welfare;
Takasaki;
Japan;
Laboratory of Organic Chemistry;
Faculty of Pharmaceutical Sciences;
Sojo University;
Kumamoto;
Japan;