1. Faculty of Pharmacy, Meijo University, Tempaku, Nagoya 468-8503, Japan, Tokai Gakuen University, Tempaku, Nagoya 468-8514, Japan, Faculty of Pharmacy, University of Dhaka, Dhaka-1000, Bangladesh, and Department of Molecular Biochemistry, Kyoto Prefectural University of Medicine, Kamigyou-ku, Kyoto 602-0841, Japan