1. Laboratory of Chemical Genomics, Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
2. Department of Anatomy, School of Medicine, Wonkwang University, Iksan, Chonbuk 570-749, Korea
3. Department of Periodontology, School of Dentistry, Wonkwang University, Iksan, Chonbuk 570-749, Korea
4. Department of Chemistry, Duke University, Durham, North Carolina 27708, United States
5. Department of Medicinal Chemistry, University of Florida, Gainesville, Florida 32610, United States