1. Japan Science and Technology Agency (JST), ERATO, Ito Glycotrilogy Project2‐1 HirosawaWako Saitama351‐0198 Japan
2. Department of Chemistry, Graduate School of ScienceOsaka University1‐1 Machikaneyama‐ChoToyonaka Osaka560‐0043 Japan
3. RIKEN Advanced Science Institute2‐1 HirosawaWako Saitama351‐0198 Japan