1. Contribution from the Departments of Applied Chemistry and of Biosciences and Informatics, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan, Kanagawa Academy of Science and Technology, KSP West, 3-2-1 Sakato, Kawasaki, Kanagawa 213-0012, Japan, and JST-CREST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan