1. Institute of Pharmacognosy, School of Pharmacy, Taipei Medical University, Taipei City, Taiwan 110-31, Department of Pharmacy, Tajen Institute of Technology, Yen-Pou, Ping Tung Shien, Taiwan 90701, Department of Chinese Medicine, Jin-Ai Municipal Hospital, Taipei City, Taiwan 10501, and Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan City, Taiwan 70101, Republic of China