1. a College of Pharmacy, and Research Institute of Drug Development , Chonnam National University , Gwangju , 500–759 , Korea
2. b Department of Biology, College of Natural Sciences , Chosun University , Gwangju , 501–757 , Korea
3. c Department of Biology, College of Natural Sciences , Chonnam National University , Gwangju , 500–759 , Korea
4. d College of Pharmacy, and Research Institute of Drug Development , Chonnam National University , Gwangju , 500–759 , Korea Phone: Fax: E-mail: