1. Faculty of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe, Mizuho, Nagoya, Aichi 467-8603, Japan, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan, and Fuji Chemical Co., Ltd., 1-35-1 Deyashiki-Nishi, Hirakata, Osaka 573-0003, Japan