1. Department of Chemistry, Chungbuk National University, Cheongju 28644, Korea
2. Department of Chemistry Education, Chungbuk National University, Cheongju 28644, Korea
3. Innovative Therapeutic Research Center, Therapeutics and Biotechnology Division, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Korea
4. Department of New Drug Discovery and Development, Chungnam National University, Daejeon 34134, Korea