1. Department of Life Science, Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea
2. Division of Drug Discovery, Anygen Co., Ltd., Gwangju 500-712, Republic of Korea
3. College of Pharmacy, Ewha Womans University, Seoul 120-759, Republic of Korea
4. Department of Pathology, School of Dentistry, Chosun University, Gwangju 501-759, Republic of Korea
5. Pharmacology Research Center, Korea Research Institute of Chemical Technology, Daejon 305-600, Republic of Korea