1. Department of Chemistry Tamkang University 251301 Tamsui Dist., New Taipei City Taiwan
2. Institute of Traditional Medicine National Yang Ming Chiao Tung University Taipei 112304 Taiwan
3. Department of Pharmacy, College of Pharmaceutical Sciences National Yang Ming Chiao Tung University Taipei 112304 Taiwan
4. Department of Medical Research China Medical University Hospital China Medical University Taichung 40447 Taiwan