1. Department of Applied Chemistry, College of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan, Department of Applied Chemistry, College of Engineering, University of Osaka Prefecture, Sakai, Osaka 591, Japan, Toray Research Center, Sonoyama 3 cho-me 2-1, Ohtsu 520, Japan, and Sawai Pharmaceutical Co. Ltd., Asahi-ku, Osaka 535, Japan