A new tetrahydrobenzofuranone metabolite from <i>Streptomyces</i> sp. HS-NF-853

<p>A new tetrahydrobenzofuranone derivative, strefuranone A (<b>1</b>), was isolated from <i>Streptomyces</i> sp. HS-NF-853. The structure of the compound was elucidated on the basis of MS and extensive NMR analysis.</p>