1. Faculty of Pharmaceutical Sciences, Hoshi University, Ebara 2-4-41 Shinagawa-ku, Tokyo 142-8501, Japan, Faculty of Pharmacy, University Teknologi MARA, 40450 Shah Alam, Selangor, Malaysia, School of Pharmaceutical Sciences, University Sains Malaysia, 11800 Penang, Malaysia, and School of Pharmacy, Tokyo University of Pharmacy & Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan