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  • Title: Antifungal metabolite with a new carbon skeleton from Keissleriella sp. YS4108, a marine filamentous fungus.
    Author: Liu CH, Meng JC, Zou WX, Huang LL, Tang HQ, Tan RX.
    Journal: Planta Med; 2002 Apr; 68(4):363-5. PubMed ID: 11988865.
    Abstract:
    In addition to four known metabolites (4-acetyl-6,8-dihydroxy-5-methylisocoumarin, 6,8-dihydroxy-3-methylisocoumarin, 6,8-dihydroxy-3,5,7-trimethylisocoumarin and 3,3'-oxy-(5-methyl)-phenol), bioassay-guided fractionation of the culture of Keissleriella sp., a marine filamentous fungus (strain number: YS 4108), afforded an antifungal metabolite with a new carbon skeleton whose structure was elucidated spectrometrically as 3,6,8-trihydroxy-3-[3,5-dimethyl-2-oxo-3(E)-heptenyl]-2,3-dihydronaphthalen-1(4H)-one. In vitro antifungal assays of all isolates revealed that the new metabolite and 3,3'-oxybis[5-methylphenol] were inhibitory to the growth of the human pathogenic fungi Candida albicans, Tricophyton rubrum and Aspergillus niger with MICs of the former being 40, 20 and 80 microg/ml, and those of the latter 10, 30 and 50 microg/ml, respectively.
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