1. Shionogi Pharmaceutical Research Center, Shionogi & Co., Ltd., 3-1-1 Futaba-cho, Toyonaka, Osaka 561-0825, Japan
2. School
of Science, Osaka Prefecture University, 1-1 Gakuen-cho,
Naka-ku, Sakai, Osaka 599-8531, Japan
3. Faculty
of Advanced Life Science, Hokkaido University, N21, W11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan