1. Natural Products Research Institute College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea
2. Department of Chemistry and Nanoscience Ewha Womans University 52 Ewhayeodae-gil, Seodaemun-gu Seoul 03760 Republic of Korea
3. Research Institute of Pharmaceutical Sciences College of Pharmacy Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Republic of Korea