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Antioxidants from the leaf extract of Byrsonima bucidaefolia
G Margarita Castillo-Avila1, Karlina García-Sosa, Luis M Peña-Rodríguez
1Grupo de Química Orgánica, Unidad de Biotecnología, Centro de Investigación Científicas de Yucatán, Calle 43 No. 130 Col. Chuburná de Hidalgo, Mérida, Yucatán, México.
Abstract:
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.
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