1. Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki 300-2611, Japan
2. The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
3. Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
4. Chemical Technology Laboratory, CMC Division, Taiho Pharmaceutical Co. Ltd., Kamikawamachi, Kodama-gun, Saitama 367-0241, Japan
5. Formulation Research, CMC Division, Taiho Pharmaceutical Co. Ltd., Kawauchi-cho, Tokushima 771-0194, Japan