1. Department of Medicinal and Applied Chemistry, College of Life Science, Kaohsiung Medical University, Kaohsiung City 807, Taiwan
2. Institute of Biotechnology, National University of Kaohsiung, 700 Kaohsiung University Road, Kaohsiung, Taiwan
3. Institute of Clinical Medicine, School of Medicine, National Cheng-Kung University, 138 Sheng-Li Road, Tainan 704, Taiwan