1. Department of Synthetic Chemistry and Biological Chemistry, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto, 606-01 Japan, The Institute for Fundamental Chemistry, 34-4 Takano Nishi-Hikari-cho, Sakyo-ku, Kyoto, 606 Japan, and Research Center, Denki Kagaku Kogyo Co., Ltd., 3-5-1 Asahimachi, Machida-shi Tokyo, 194 Japan