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Two new compounds, versicolones A and B ( and ), and three known pyrone derivatives (-) were isolated from the insect-associated fungus . Their structures were elucidated through a combination of HRESIMS and NMR spectroscopic analysis. Versicolone A () was revealed as a coumarin derivative with the rare 5-alkyl side chain substitution. Compound exhibited significant antioxidant activity with EC value of 8.0 μM in the ABTS (2,2-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid) assay, which was more than 2-fold potency of the positive control trolox.
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| http://dx.doi.org/10.1080/14786419.2018.1509334 | DOI Listing |
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