1. Pharmacognosy Laboratory, College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
2. Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
3. Chemical Biology Institute, Yale University, West Haven, Connecticut 06516, United States
4. Molecular and Translational Research Laboratory, College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea