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Stictic acid derivatives from the lichen Usnea articulata and their antioxidant activities

Abstract : Two new beta-orcinol depsidones, 1 and 2, together with 13 known compounds were isolated from the lichen Usnea articulata. The structures of 1 and 2 were elucidated by spectroscopic analyses and those of known compounds by comparison of their spectroscopic data with literature values or by direct comparison with authentic standards. Compounds 1, 2, and 5 exhibited moderate antiradical activity in the 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The depsidones 4 and 5 showed better superoxide anion scavenging activity (IC50 = 566 and 580 microM, respectively) than quercetin (IC50 = 754 microM).
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01470076
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Submitted on : Friday, February 17, 2017 - 9:43:53 AM
Last modification on : Thursday, December 12, 2019 - 1:50:29 PM

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Françoise Lohézic-Le Dévéhat, Sophie Tomasi, John A. Elix, Aurélie Bernard, Isabelle Rouaud, et al.. Stictic acid derivatives from the lichen Usnea articulata and their antioxidant activities. Journal of Natural Products, American Chemical Society, 2007, 70, pp.1218-1220. ⟨10.1021/np070145k⟩. ⟨hal-01470076⟩

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