[1] Toho Univ, Fac Pharmaceut Sci, Miyama 2-2-1, Funabashi, Chiba 2748510, Japan
[2] Shenyang Pharmaceut Univ, Minist Educ, Key Lab Struct Based Drug Design & Discovery, Shenyang 110016, Liaoning, Peoples R China
[3] Duke Univ, Med Ctr, Dept Surg, Surg Sci, Durham, NC 27710 USA
[4] Univ N Carolina, Eshelman Sch Pharm, Nat Prod Res Labs, Chapel Hill, NC 27599 USA
[5] China Med Univ & Hosp, Chinese Med Res & Dev Ctr, Taichung 40402, Taiwan