1. Research Institute for Wakan-Yaku and Faculty of Pharmaceutical Sciences, Toyama Medical and Pharmaceutical University, Sugitani, Toyama 930-0194, Japan, Faculty of Education, Toyama University, Gofuku, Toyama 930-8555, Japan, and College of Pharmacy, Pusan National University, Gumjung-Ku, Pusan 609-735, Korea