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- W4283025377 abstract "Furofuran lignanes show important biological activities for the treatment of infectious diseases, inflammatory and metabolic pathologies. They have been isolated from leaves and barks of many plants. In Chile the native conifer Araucaria araucana produces eudesmin, matairesinol, secoisolariciresinol and lariciresinol in stemwood, branchwood and knotwood. These compounds were previously isolated by laborious flash chromatography on silica gel. Here we report the easy isolation of eudesmin by soxhlet extraction from milled knots of Araucaria araucana with hexane, followed by cryo-crystallization at −20 °C. Upon bromination of the isolated eudesmin epimerization at one benzylic position occurs, giving epieudesmin and the corresponding mono and di-brominated derivatives. The structures were determined by 1D, 2D NMR and X-ray diffraction. The analysis of products against Candida yeast showed that eudesmin has a moderate activity against different strains of Candida from 62.5 to 500 µg/mL. This activity decreases for epieudesmin, while bromine derivatives are not active." @default.
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- W4283025377 date "2022-06-16" @default.
- W4283025377 modified "2023-09-24" @default.
- W4283025377 title "Bromination of eudesmin isolated from <i>araucaria araucana</i> induces epimerization and give bromine derivatives with loss of anti-Candida activity" @default.
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- W4283025377 doi "https://doi.org/10.1080/14786419.2022.2089140" @default.
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