1. Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Korea
2. Department of Brain and Cognitive Sciences, Ewha Womans University, Seoul 120-750, Korea
3. Brain Disease Research Institute, Ewha Womans University, Seoul 120-750, Korea
4. GNT Pharma Co. Ltd., Yongin 446-901, Korea
5. Department of Neuroscience, Ajou University School of Medicine, Suwon 443-749, Korea