1. Laboratory of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1, Shirokane,
Minato-ku, Tokyo 108-8641, Japan
2. Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1, Shirokane,
Minato-ku, Tokyo 108-8641, Japan
3. Laboratory of Pharmacology, School of Pharmacy, Kitasato University, 5-9-1, Shirokane,
Minato-ku, Tokyo 108-8641, Japan