A phytotoxic bicyclic lactone and other compounds from endophyte <i>Xylaria curta</i>

<p>A new compound, (3a<i>S</i>,6a<i>R</i>)-4,5-dimethyl-3,3a,6,6a-tetrahydro-2H-cyclopenta [<i>b</i>]furan-2-one (<b>2</b>), along with two known metabolites, myrotheciumone A (<b>1</b>) and 4-oxo-4<i>H</i>-pyron-3-acetic acid (<b>3</b>) was isolated from the ethyl acetate extract of fermentation broth of <i>Xylaria curta</i> 92092022. The structures of these compounds were elucidated on the basis of spectroscopic methods (UV, IR, HRESITOFMS, 1D NMR, and 2D NMR). Compounds <b>1</b> and <b>2</b> showed moderate antibacterial and phytotoxic activities.</p>