1. Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1, Inohana, Chuo-ku, Chiba 260-8675, Japan
2. Graduate School of Science, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
3. Faculty of Pharmaceutical Sciences, Sojo University, 4-22-1, Ikeda,
Nishi-ku, Kumamoto 860-0082, Japan