1. Research
Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Korea
2. College
of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116-029, China
3. College
of Pharmacy, Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea
4. 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
5. College
of Pharmacy, Dongguk University, Goyang, Gyeonggi-do 410-820, Korea
6. Department
of Chemistry, The University of Suwon, Hwaseong, Gyeonggi-do 445-743, Korea