A bioassay-guided phytochemical study of a leaf extract with antifungal activity permitted the identification of 28 compounds, including the new 6-(βboivinopyranosyl)apigenin (), 8-(βoliopyranosyl)apigenin (), ()-6-(2-carboxyethenyl)apigenin (), ()-8-(2-carboxyethenyl)apigenin (), and 7,5″-anhydro-6-(α-2,6-dideoxy-5-hydroxyarabinohexopyranosyl)apigenin (). The structures of the new compounds were determined by comprehensive spectroscopic analysis, including 1D and 2D NMR techniques, and by mass spectrometry. Compound showed promising activity and selectivity against (IC 44 nM), which exhibits resistance to azoles. The association of the major components 3-β-d-glucopyranosyloxysitosterol () and ethyl gallate () was synergistic against , especially the IC values of compound , which were reduced by more than 100-fold.
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http://dx.doi.org/10.1021/acs.jnatprod.8b01025 | DOI Listing |
J Nat Prod
January 2025
Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States.
A structurally novel metabolite, fatuamide A (), was discovered from a laboratory cultured strain of the marine cyanobacterium sp., collected from Faga'itua Bay, American Samoa. A bioassay-guided approach using NCI-H460 human lung cancer cells directed the isolation of fatuamide A, which was obtained from the most cytotoxic fraction.
View Article and Find Full Text PDFJ Pestic Sci
November 2024
Faculty of Agriculture, Tottori University.
A search for antifungal compounds from the mushroom using a bioassay-guided chromatographic fractionation approach led to the discovery of a novel polyketide harboring a rare 3,3a,9,9a-tetrahydro-1-furo[3,4-]chromen-1-one skeleton. The novel compound was named coprinolide. The inhibitory activity and fungicidal potential of coprinolide were evaluated against five economically important plant-pathogenic fungi.
View Article and Find Full Text PDFMolecules
January 2025
Department of Pharmaceutical Biology, Leipzig University, Johannisallee 21, 04103 Leipzig, Germany.
L. is known in Europe for its cardioactivity-also in interrelation with known risk factors of the metabolic syndrome-just as Houtt. in East Asia; however, up to now, no active constituents could be identified.
View Article and Find Full Text PDFChem Biodivers
January 2025
Kunming Institute of Botany Chinese Academy of Sciences, Key laboratory of economic plants and biotechnology, 132# Lanhei Road, Heilongtan, Kunming, Yunnan, China, 650201, Kunming, CHINA.
Mesua ferrea L. is used in Ayurvedic and Thai medicine for treating various diseases, including diabetes. This study aimed to isolate and identify the bioactive constituents from M.
View Article and Find Full Text PDFMar Drugs
January 2025
Department of Ecosustainable Marine Biotechnology, Stazione Zoologica Anton Dohrn, Via A.F. Acton, 55, 80133 Naples, Italy.
With rising concerns about antimicrobial resistance, the identification of new lead compounds to target multidrug-resistant bacteria is essential. This study employed a fast miniaturized screening to simultaneously cultivate and evaluate about 300 marine strains for biosurfactant and antibacterial activities, leading to the selection of the deep-sea BCP32. The integration of tandem mass spectrometry molecular networking and bioassay-guided fractionation unveiled this strain as a prolific factory of surfactins and nobilamides.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!