1. Natural Products Laboratory, School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
2. Gachon Institute of Pharmaceutical Science, Gachon University, Incheon 21936, Republic of Korea
3. College of Pharmacy, Gachon University, #191, Hambakmoero, Yeonsu-gu, Incheon 21936, Republic of Korea
4. Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
5. Chemical Biology Institute, Yale University, West Haven, Connecticut 06516, United States
6. Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea