1. Faculty
of Pharmaceutical Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1, Higashijima, Akiha-ku, Niigata 956-8603, Japan
2. Department
of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh
Road, Hsinchu 30010, Taiwan
3. Graduate
School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan