Abstract
A new metabolite, infectopyrone ( 1 ), has been isolated from the filamentous fungus Alternaria infectoria. The structure was elucidated by analysis of 2D NMR spectroscopic data. Infectopyrone is an α-pyrone resembling known toxins, and is a useful phenotaxonomic marker for the A. infectoria species-group. Infectopyrone was also produced by species within Stemphyllium and Ulocladium, and found in mouldy food.
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