1. Department of ChemistryTohoku University Aoba-ku Sendai 980-8577 Japan
2. Department of ChemistryThe University of Tokyo Hongo, Bunkyo-ku Tokyo 113-0033 Japan
3. JST, ERATOIsobe Degenerate π-Integration Project Hongo, Bunkyo-ku Tokyo 113-0033 Japan
4. Konica Minolta Ishikawacho Hachioji 192-8505 Japan