1. Graduate Institute of Pharmacognosy, Taipei Medical University, Taipei 110, Taiwan
2. Department of Chinese Pharmaceutical Sciences and Medicine Resources, College of Pharmacy, China Medical University, Taichung 404, Taiwan
3. School of Pharmacy, Taipei Medical University, Taipei 110, Taiwan
4. Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
5. National Institute of Cancer Research, National Health Research Institutes, Tainan 707, Taiwan
6. Department of Health and Nutrition Biotechnology, Asia University, Taichung 413, Taiwan
7. Institute of Biopharmaceutical Sciences, National Yang-Ming University, Taipei 112, Taiwan
8. Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
9. Tsuzuki Institute for Traditional Medicine, College of Pharmacy, China Medical University, Taichung 404, Taiwan