1. Department
of Chemistry, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea
2. Department
of Bio-new-drug Development, Chosun University, Gwangju, 501-759, Republic of Korea
3. Department
of Chemistry, Sejong University, Seoul 143-747, Republic of Korea
4. Department
of Cellular·Molecular Medicine, College of Medicine, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, 501-759, Republic of Korea