1. College of Pharmacy, Catholic University of Daegu, Gyeongsan, Gyeongbuk 712-702, Korea
2. Faculty of Chemistry, University
of Natural Science, National University of Hochiminh City, Hochiminh City, Vietnam
3. Korea Research Institute of Chemical Technology, Daejeon 305-600, Korea
4. Korea Basic Science Institute, Daejeon
305-806, Korea
5. Faculty
of Food Science and Biotechnology, Pukyung National University, Busan 608-737, Korea
6. College of Natural Science, Kangwon National University, Kangwon 200-701, Korea