1. Department of Applied Chemistry, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466, Japan, Pharmaceutics, Faculty of Pharmaceutical Science, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467, Japan, and Department of Science of Living, Osaka Kun'ei Women's Junior College, Shojaku, Settu, Osaka 566, Japan