1. Department of Biomedical Science, Graduate School, Kyung Hee University, 02447 Seoul, South Korea
2. Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, School of Medicine, Kyung Hee University, 02447 Seoul, South Korea
3. Institute of Pharmaceutical and Medicinal Chemistry, Heinrich Heine University, 40225 Dusseldorf, Germany
4. Pharmaceutical and Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
5. Institute for Drug Discovery, Medical Faculty, Leipzig University, Brüderstraße 34, 04103 Leipzig, Germany
6. Department of Medical Zoology, Kyung Hee University, School of Medicine, 02447 Seoul, South Korea