1. Center for Biofunctional Molecules, Department of Chemistry, Yonsei University, Seoul 120-749, Korea
2. Department of Pharmacology, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul 120-752, Korea
3. Lee Gil Ya Cancer and Diabetes Institute, Gachon University of Medicine and Science, Incheon 406-840, Korea
4. New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 706-010, Korea