Abstract
Aspergillus caespitosus NRRL 5769 growing in broth containing small amounts of sitosterol produced substance(s) with greater inhibitory activity against Candida albicans ATCC 10231 than in broth without sitosterol. Subsequent isolation, purification, and structural elucidation yielded 5,6-dihydro-5(S)-acetoxy-6(S)-(1,2-trans-epoxypropyl)-2H-pyran-2-one (asperline (1), compound I) and two new metabolites. These were 5,6-dihydro-5(S)-acetoxy-6(S)-(1,2-trans propenyl)-2H-pyran-2-one (compound II) and 5,6-dihydro-5(R)-acetoxy-6(S)-(1,2-trans-epoxypropyl)-H-pyran-2-one (compound III). These three metabolites showed anti-microbial activity against C. albicans and against specific bacteria, fungi, and a trichomonad.
Publisher
Canadian Science Publishing
Subject
Genetics,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Immunology,Microbiology
Cited by
28 articles.
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