1. Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, 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. College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
5. College of Pharmacy, CHA University, Gyeonggi-do 11160, Republic of Korea