[Chen, Yuyan] Hunan Inst Sci & Technol, Coll Chem & Chem Engn, Yueyang 414006, Hunan, Peoples R China.^[Chen, Yuyan;Li, Juan] Hunan Univ Chinese Med, Sch Pharm, Changsha 410208, Hunan, Peoples R China.^[Li, Shun Xiang] Hunan Univ Chinese Med, Hunan Prov Engn Res Ctr Bioact Subst & Discovery, Sch Pharm, Changsha 410208, Hunan, Peoples R China.^[Zhao, Jianping] Univ Mississippi, Sch Pharm, Natl Ctr Nat Prod Res, University, MS 38677 USA.^[Bernier, Ulrich R.;Becnel, James J.;Agramonte, Natasha M.] ARS, Ctr Med Agr & Vet Entomol, USDA, Gainesville, FL 32608 USA.^[Agramonte, Natasha M.] Univ Florida, Dept Entomol & Nematol, Emerging Pathogens Inst, Gainesville, FL 32611 USA.^[Duke, Stephen O.;Cantrell, Charles L.;Wedge, David E.] USDA ARS, Nat Prod Utilizat Res Unit, Natl Ctr Nat Prod Res, University, MS 38677 USA.