1Technology Research & Development Center, Dainippon Sumitomo Pharma Co., Ltd. 3-1-98, Kasugade-naka, Konohana-ku, Osaka 554-8558, Japan
2Tsukuba Research Laboratory, Sumitomo Chemical Co., Ltd. 6, Kitahara, Tsukuba City, Ibaraki 300-3294, Japan
3Department of Pharmaceutics, Hoshi University, 2-4-41 Ebara, Shinagawa-ku, Tokyo, 142-8501, Japan
4Department of Pharmaceutical Technology, Musashino University, 1-1-20 Shinmachi, Nishi-Tokyo 202-8585, Japan