1. Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka,
Osaka, 560-0043 Japan
2. Japan Science and Technology Agency (JST), ERATO, Ito Glycotrilogy Project,
2-1 Hirosawa, Wako, Saitama, 351-0198 Japan
3. RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama, 351-0198 Japan