1. Department of Medicinal and Applied ChemistryKaohsiung Medical University No. 100, Shih-Chuan 1st Road, Sanmin District Kaohsiung City 807 Taiwan
2. Department of Chemistry, Faculty of Engineering and TechnologySRM Institute of Science and Technology, Kattankulathur Chennai 603203 India
3. Department of Medical ResearchKaohsiung Medical University Hospital No. 100, Tzyou 1st Road, Sanmin District Kaohsiung City 807 Taiwan