Results 51 to 60 of about 1,481 (197)
The isolation, analytical characterization by HPLC-UV and NMR spectroscopy, cytotoxic and antioxidant activities of baeomycesic acid from Thamnolia vermicularis var. subuliformis [PDF]
Hemijska Industrija, 2011 The aim of this work was the analytical characterization of the β-orcinol depside, baeomycesic acid in lichens extracts. The extract of Thamnolia vermicularis var.
Manojlović Nedeljko T. +5 more
doaj +1 more source
Ingeniería e Investigación, 2022 In this study, phenolic compounds were extracted from the essential oil of coffee grounds originated in the coffee industry in the city of Guayaquil, Ecuador.
Rafael Norberto Calle Chumo +3 more
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Frontiers in Forests and Global Change, 2022 Diversity of secondary lichen metabolites was studied in epiphytic lichens on six phorophytes—spruce, pine, birch, alder, aspen and poplar in the Middle Urals of Russia. Atranorin, usnic, fumarprotocetraric acid, zeorin, and gyrophoric acid were found in
Alexander Paukov +4 more
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New Depsides From Erioderma Lichens
, 1987 A chemosyndrome of para- depsides based on methyl 4-O-demethylbarbatate (3) has been detected in Erioderma lichens and the structures of the metabolites have been established by unambiguous syntheses.
JA Elix +4 more
core +1 more source
Caffeic Acid Derivatives from Eupatorium perfoliatum L.
Molecules, 2008 From the ethyl acetate soluble fraction of a methanol/water extract of the herb Eupatorium perfoliatum L. (Asteraceae) six caffeic acid derivatives have been isolated and identified by 1D- and 2D-NMR spectroscopic data.
Andreas Hensel +2 more
doaj +1 more source
Acta Pharmaceutica Sinica B, 2023 Depsides and depsidones have attracted attention for biosynthetic studies due to their broad biological activities and structural diversity. Previous structure‒activity relationships indicated that triple halogenated depsidones display the best anti ...
Jiafan Yang +4 more
doaj +1 more source
Redirecting a Fungal Quercetin 2,3‐Dioxygenase Toward Artificial Flavonols
ChemCatChem, Volume 18, Issue 6, 27 March 2026.A novel quercetin 2,3‐dioxygenase was engineered to reshape its substrate‐binding cavity and redirect its specificity toward artificial flavonols. One variant with a larger substrate‐binding cavity exhibited 20‐ to 1750‐fold higher activity toward bulky flavonols with phenyl‐based substitutions at position C‐8.
Michael Kotik +9 more
wiley +1 more source
Synthesis of Lichen para-Sphaerophorol Depsides
, 1987 The total synthesis of the lichen depsides sphaerophorin (I), 4-O-demethylsphaerophorin (2),isosphaeric acid (3), hyperlatolic acid (4) and isohyperlatolic acid (5) is described.
JA Elix, JH Wardlaw
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Phytochemical Analysis, Volume 37, Issue 2, Page 330-343, March 2026.ABSTRACT Introduction Lichexanthones are the major xanthones found in lichens. They present a high degree of isomerism, which makes their identification tedious. Xanthones are known to occur in lichens according to chemosyndromes, and these compounds act as chemotaxonomic markers.
Solenn Ferron +5 more
wiley +1 more source
New Depsides From the Lichen Biatora sorediosa
, 1991 The new depsides 2′-O-methylisohyperlatolic acid (4) and 2′-O-methylsuperlatolic acid (5) have been detected in the lichen Biatora sorediosa, and the structure of these metabolites has been established by unambiguous synthesis.
F David, JA Elix
core +1 more source