Affiliation: | 1. Research and Analytical Center for Giant Molecules, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan);2. Department of Chemistry, Graduate School of Science, Tohoku University, Aramaki, Aoba‐ku, Sendai 980‐8578 (Japan);3. Process Technology Research Laboratories, Daiichi Sankyo Co., Ltd, Edogawa‐ku, Tokyo 134‐8630 (Japan) |