1. Department of Chemistry, Duke University, 124 Science Drive, Box 90346, Durham, North Carolina 27708, United States
2. Department of Biochemistry, Duke University Medical Center, Box 3711, Durham, North Carolina 27710, United States
3. College of Pharmacy, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
4. School of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Republic of Korea