1. Precursory Research for Embryonic Science and Technology Japan Science and Technology Agency 4-1-8 Honcho, Kawaguchi Saitama 332-0012 Japan
2. Okayama University 3-1-1 Tsushima, Kita-ku Okayama 700-8530 Japan
3. Department of ChemistryGraduate School of Natural Science and TechnologyOkayama University 3-1-1 Tsushima, Kita-ku Okayama 700-8530 Japan
4. Department of Chemistry and Materials TechnologyKyoto Institute of Technology Matugasaki, Sakyo-ku Kyoto 606-8585 Japan