摘要
Two new tirucallane triterpenoids,2a-ethoxy-2,3-secotirucalla-2,29-epoxy-7-ene-23-oxo-3-oic acid(1)and(23E)-2a-hydroxytirucalla-7,23,25-triene-3-one(2),along with the known 2,3-secotirucalla-2,3;2,29-diepoxy-7-ene-3,23-dione(3),were isolated from the leaves and twigs of Aphanamixis grandifolia.Their structures were elucidated by extensive NMR and MS data,and compound 3 was further confirmed by X-ray crystal diffraction analysis.Antimicrobial activities and insecticidal activities of these three compounds were also evaluated.Compound 1 showed good antimicrobial activity against Staphylococcus aureus with the MIC value of 1.56μg/mL,while compounds 1 and 2 showed insecticidal activity at 100 ppm,with the corrected mortality 79.1%and 60.6%,respectively.
基金
This work was financially supported by grants from the National Basic Research Program of China(973 Program,2009CB522300 and 2009CB940900)
National Natural Science Funding of China(31170332)
the Young Academic and Technical Leader Raising Foundation of Yunnan Province(2010CI047).
