1. Laboratory of Synthetic and Medicinal Chemistry; Faculty of Pharmaceutical Sciences; Tohoku Medical and Pharmaceutical University; 4-4-1 Komatsushima, Aoba-ku 981-8558 Sendai Japan
2. Division of Molecular Pharmacology; Cancer Chemotherapy Centre; Japanese Foundation for Cancer Research; 3-8-31 Ariake, Koto-ku 135-8550 Tokyo Japan
3. Pharmaceuticals and Medical Devices Agency (PMDA); 3-3-2 Kasumigaseki, Chiyoda-ku 100-0013 Tokyo Japan
4. RIKEN; Chemical Genetics Laboratory; 2-1 Hirosawa 351-0198 Wako-shi Saitama Japan