1. Research and Development Center, Nagase & Co., Ltd., 2-2-3 Murotani, Nishi-ku, Kobe, 651-2241 Japan, Research and Development Department, Fine Chemicals Business Group, Nagase ChemteX Corporation, 5-41 Senzo, Itami, 664-0898 Japan, Faculty of Engineering, Saitama University, 255 Shimo-ohkubo, Saitama 338-8570 Japan, and Research and Development Department, Specialty Chemicals Business Group, Nagase ChemteX Corporation, 236 Tatsuno-nakai, Tatsuno, 671-4124 Japan