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alpha pyrone/nekrose
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8 resultater
Allantopyrone A, an α-pyrone metabolite from an endophytic fungus, inhibits the tumor necrosis factor α-induced nuclear factor κB signaling pathway.
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Tumor necrosis factor α (TNF-α) induces the activation of transcription factor nuclear factor κB (NF-κB), which upregulates a variety of genes, including the gene encoding intercellular adhesion molecule-1 (ICAM-1). Allantopyrone A, a recently identified α-pyrone metabolite from an endophytic
A novel (6S)-4,6-dimethyldodeca-2E,4E-dienoyl ester of phomalactone and related alpha-pyrone esters from a Phomopsis sp. with cytokine production inhibitory activity.
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A series of novel 6-substituted 5,6-dihydro-5-hydroxy-alpha-pyrone esters, 1 approximately 3, isolated from fermentations of a Phomopsis sp. (Xenova culture collection no. X22502) have been identified as inhibitors of lipopolysaccharide (LPS)-induced cytokine production. These include the
Chemical constituents from a soil-derived actinomycete, Actinomadura miaoliensis BCRC 16873, and their inhibitory activities on lipopolysaccharide-induced tumor necrosis factor production.
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An investigation on the secondary metabolites from the BuOH extract of the fermentation broth of the thermotolerant polyester-degrading actinomycete Actinomadura miaoliensis BCRC 16873 was carried out. One previously undescribed α-pyrone (=pyran-2-one) derivative, designated as miaolienone (1), and
Bioactive α-Pyrone Derivatives from the Endolichenic Fungus Dothideomycetes sp. EL003334.
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Two new α-pyrones, dothideopyrones E (1) and F (2), were isolated from a culture of the endolichenic fungus Dothideomycetes sp. EL003334. Their structures were elucidated by spectroscopic data analysis. Their absolute configurations were established by the modified Mosher's method. Compound 2
NTP Toxicology and Carcinogenesis Studies of Coumarin (CAS No. 91-64-5) in F344/N Rats and B6C3F1 Mice (Gavage Studies).
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Coumarin is the basic structure of numerous naturally occurring compounds with important and diverse physiological activities. More than a thousand coumarin derivatives have been described, varying from simple coumarins containing alkyl and hydroxyl side chains to complex coumarins with benzoyl,
Neurymenolide A, a Novel Mitotic Spindle Poison from the New Caledonian Rhodophyta Phacelocarpus neurymenioides.
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The marine α-pyrone macrolide neurymenolide A was previously isolated from the Fijian red macroalga, Neurymenia fraxinifolia, and characterized as an antibacterial agent against antibiotic-resistant strains that also exhibited moderate cytotoxicity in vitro against cancer cell lines. This
Gulypyrones A and B and Phomentrioloxins B and C Produced by Diaporthe gulyae, a Potential Mycoherbicide for Saffron Thistle (Carthamus lanatus).
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A virulent strain of Diaporthe gulyae, isolated from stem cankers of sunflower and known to be pathogenic to saffron thistle, has been shown to produce both known and previously undescribed metabolites when grown in either static liquid culture or a bioreactor. Together with phomentrioloxin, a
Biological characterization of fusapyrone and deoxyfusapyrone, two bioactive secondary metabolites of Fusarium semitectum.
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Fusapyrone (1) and deoxyfusapyrone (2), two alpha-pyrones originally isolated from rice cultures of Fusarium semitectum, were tested in several biological assays. Compounds 1 and 2 showed considerable antifungal activity against several plant pathogenic and/or mycotoxigenic filamentous fungi,
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