1. Faculty of Pharmaceutical SciencesHokkaido University Kita-12, Nishi-6 Kita-ku Sapporo 060-0812 Japan
2. Faculty of Pharmaceutical SciencesHealth SciencesUniversity of Hokkaido 1757 Kanazawa Tobetsu Ishikari-gun 061-0293 Japan
3. Center for Research and Education on Drug DiscoveryHokkaido University Kita-12, Nishi-6 Kita-ku Sapporo 060-0812 Japan