Affiliation: | 1. Bio-Organic Science Division, Korea Research Institute of Chemical Technology, PO Box 107, Daejeon 305-600, Republic of Korea;2. Medicinal & Pharmaceutical Chemistry, University of Science & Technology, Daejeon 305-350, Republic of Korea;3. Korea Chemical Bank, Daejeon 305-600, Republic of Korea;4. College of Pharmacy, Chungbuk National University, Cheongju 361-763, Republic of Korea;5. College of Pharmacy, Chungnam National University, Daejeon 305-764, Republic of Korea |