1. Electronic Materials Research Laboratories, Nissan Chemical Industries, Ltd., 722-1, Tsuboi-cho, Funabashi-shi, Chiba 274-8507, Japan; Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan; and Department of Biotechnology, Tokyo University of Agriculture and Technology, Nakacho, Koganei, Tokyo 184-8588, Japan