1. College of Pharmacy; Yeungnam University; Kyoungsan; Kyoungbuk; 712-749; South Korea
2. Department of Bioinspired Science; Division of Life and Pharmaceutical Sciences and College of Pharmacy; Ewha Womans University; Seoul; 120-750; South Korea
3. Department of Chemistry; Yonsei University; Seoul; 120-749; South Korea
4. Division of Life and Pharmaceutical Sciences and College of Pharmacy; Ewha Womans University; Seoul; 120-750; South Korea
5. College of Pharmacy; Chungnam National University; Daejeon; 305-764; South Korea