[1] Kaohsiung Med Univ, Grad Inst Nat Prod, Kaohsiung 807, Taiwan
[2] Kaohsiung Med Univ, Grad Inst Pharmaceut Sci, Kaohsiung 807, Taiwan
[3] Natl Res Inst Chinese Med, Taipei 112, Taiwan
[4] Univ N Carolina, Sch Pharm, Nat Prod Lab, Chapel Hill, NC 27599 USA
[5] Natl Taitung Univ, Inst Life Sci, Taitung 950, Taiwan
[6] Kyoto Prefectural Univ Med, Dept Biochem & Mol Biol, Kamigyo Ku, Kyoto 6020841, Japan