A new benzenoid, 4-methoxy-7-methylbenzo[d][1,3]dioxol-5-ol (1) and three known secondary metabolites 2,3-dimethoxy-5-methyl[1,4]benzoquinone (2), 2-methoxy-6-methyl-1,4-benzoquinone (3) and 5-methyl-benzo[1,3]dioxole-4,7-diol (4) were isolated from the mycelia of A. cinnamomea BCRC 36799 by solid state fermentation with adlay. Their chemical structures were elucidated on the basis of HRESIMS, NMR spectroscopic data and comparison with reported values. All isolated compounds 1–4 were tested for their cytotoxicity against the six cancer cell lines using the MTT assay. Among them, compound 3 displayed significant cytotoxic effects toward all six tested cancer cell lines, with IC50 values ranging from 2.8–8.7 μM in vitro.
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