1. Research
Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
2. College
of Pharmacy, Graduate School of Pharmaceutical Sciences and Global
Top 5 Research Program, Ewha Womans University, Seoul 120-750, Korea
3. Molecular
Recognition Section, Laboratory of Bioorganic Chemistry, National
Institute of Diabetes, and Digestive and Kidney Disease, National Institutes of Health, Bethesda, Maryland 20892, United States