1. Contribution from the Graduate School of Pharmaceutical Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai 980-8578, Japan, Advanced Elements Chemistry Laboratory, The Institute of Physical and Chemical Research, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, U.K., “Synthesis and Control,” PRESTO, Japan Science and Technology Agency (JST), Japan, and Graduate School of Pharmaceutical Sciences, The...