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Biflavonoids from the unripe fruits of clusia paralicola and their antioxidant activity

机译:熟丛未熟果实中的双黄酮及其抗氧化活性

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摘要

Investigation of the green fruits of Clusia paralicola (Clusiaceae) led to the isolation and characterization of two 3,8'-biflavonoids, 2R, 3S, 2'R, 3'R-GB1-7'-O-β-glucoside (1) and 2R, 3S, 2'R, 3,8'-binaringenin-7'-O- β-glucoside (2), together with four known compounds: β-sitosterol, stigmasterol, β-amyrin, and epicatechin. The structures were established from the IR, LC-ESI-MS and NMR spectral data, including 2D-NMR experiments. The absolute configurations of 1 and 2 were determined by CD spectra. The total extract and the biflavonoids demonstrated significant antioxidant activity in DPPH, ABTS, and β-carotene/linoleic acid tests.
机译:对伞形clusia(Clusiaceae)的绿色水果的研究导致分离并鉴定了两个3,8'-双黄酮,2R,3S,2'R,3'R-GB1-7'-O-β-葡萄糖苷(1 )和2R,3S,2'R,3,8'-Binaringenin-7'-O-β-葡萄糖苷(2),以及四种已知化合物:β-谷甾醇,豆甾醇,β-amyrin和表儿茶素。由IR,LC-ESI-MS和NMR光谱数据(包括2D-NMR实验)建立结构。 1和2的绝对构型由CD光谱确定。总提取物和双黄酮类化合物在DPPH,ABTS和β-胡萝卜素/亚油酸测试中显示出显着的抗氧化活性。

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