ブラジル土壌より分離されたアスペルジルス・フミガツスIFM 54246株から得られた抗真菌活性物質

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  • Antifungal Substances Isolated from Aspergillus fumigatus IFM 54246, Obtained from a Brasilian soil

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In the screening for new antifungal substances against pathogenic filamentous fungi and yeasts, a naturally new compound, 2,4-dihydroxy-3-methylacetophenone (2), was isolated along with tryptoquivaline I (1) from the methylene chloride-methanol (1:1) extract of Aspergillus fumigatus IFM 54246, obtained from a Brasilian soil, screened by possessing the antifungal activity against Aspergillus fumigatus, Aspergillus niger, Candida albicans and Cryptococcus neoformans. The structure of 2 was determined from the analysis of the spectroscopic investigation. Compound 2 showed the broad antifungal activity against A. fumigatus, A. niger, C. albicans, and C. neoformans, whereas tryptoquivaline I (1) showed the inhibition only against A. fumigatus. The main antifungal substance in the extract of the A. fumigatus strain was considered to be compound 2.

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