1. Faculty of Health Promotional Sciences, Dept. of Health Promotional SciencesHamamatsu Univ. Hamamatsu 431—2102 Japan
2. Graduate School of Science and TechnologyShizuoka Univ. Shizuoka 422—8529 Japan
3. Key Laboratory of Natural Product Research and Development, College of Food Science and EngineeringJiangxi Agricultural Univ. Nanchang 330029 China