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Antioxidants from the leaf extract of Byrsonima bucidaefolia

机译:百日草叶片提取物中的抗氧化剂

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摘要

The radical scavenging assay-guided fractionation of the leaf extract of Byrsonima bucidaefolia Standl. yielded two metabolites with antioxidant activity, identified as methyl gallate (1) and methyl m-trigallate (2) on the basis of their spectroscopic data. Both 1 and 2 were identified as artifacts of the extraction and/or the purification process, possibly resulting from transesterification of precursor gallotannins. Evaluation of the antioxidant activity of both the isolated metabolites 1 and 2 and three of their derivatives (3-5), showed that 1 and 2 have a stronger antioxidant activity than vitamin C when tested using the DPPH reduction assay.
机译:自由基清除测定法指导的Byrsonima bucidaefolia Standl叶片提取物的分级分离。产生两种具有抗氧化活性的代谢物,根据其光谱数据鉴定为没食子酸甲酯(1)和间三没食子酸甲酯(2)。 1和2均被认为是提取和/或纯化过程的假象,这可能是前体没食子鞣质的酯交换反应造成的。对分离的代谢物1和2及其三个衍生物(3-5)的抗氧化活性的评估显示,当使用DPPH还原测定法进行测试时,1和2的抗氧化活性比维生素C强。

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