Antimicrobial and antioxidant isoflavonoid derivatives from the roots of Amphimas pterocarpoides

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Abstract

A new bis-isoflavone derivative, named amphiisoflavone (1), was isolated from the roots of Amphimas pterocarpoides, together with three known isoflavones, namely 8-methoxyisoformononetin (2), 6-methoxyisoformononetin (3) and isoformononetin (4). Chemical transformations carried out on compound 3 led to two new derivatives, 4'-acetoxy-6,7-dimethylisoflavone (3a) and 4'-O-prenyl-6,7-dimethylisoflavone (3p), along with a known compound, 4',6,7-trimethoxyisoflavone (3m). The structures of all compounds were elucidated from spectroscopic evidence, in particular by 1D and 2D NMR spectroscopic methods. These compounds were evaluated for their antioxidant properties and for their antimicrobial activities against a wide range of bacteria and fungi. © 2013 Verlag der Zeitschrift fur Naturforschung, Tubingen • http://znaturforsch.com.

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Saah, E. P. F., Sielinou, V. T., Kuete, V., Lacmata, S. T., & Nkengfack, A. E. (2013). Antimicrobial and antioxidant isoflavonoid derivatives from the roots of Amphimas pterocarpoides. Zeitschrift Fur Naturforschung - Section B Journal of Chemical Sciences, 68(8), 931–938. https://doi.org/10.5560/ZNB.2013-3106

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