[1] Sungkyunkwan Univ, Sch Pharm, Nat Prod Lab, Suwon 16419, South Korea
[2] Yale Univ, Dept Chem, 225 Prospect St, New Haven, CT 06520 USA
[3] Yale Univ, Inst Chem Biol, West Haven, CT 06516 USA
[4] Gachon Univ, Gachon Inst Pharmaceut Sci, Incheon 21936, South Korea
[5] Gachon Univ, Coll Pharm, 191 Hambakmoero, Incheon 21936, South Korea
[6] Korea Res Inst Chem Technol, Daejeon 34114, South Korea