1. Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
2. School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
3. Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Korea
4. Department of Chemistry, Duke University, Durham, North Carolina 27708, United States