Polyketides from <i>Pestalotiopsis zonata</i> and structure revision of pestalrones A and B

<p>The structures of pestalrones A-B were revised via reinterpretation of the NMR data and a brief chemical transformation from the co-occurring polyketides, in our investigation on the secondary metabolites of <i>Pestalotiopsis zonata</i>, which also afforded a new <i>α</i>-pyrone derivative, pestazonatic acid, and four known analogs.</p>