Maleic anhydride and chromone derivatives from the endophytic fungus BCC 54265 (Botryosphaeriaceae)

<p>A maleic anhydride derivative, botryoanhydride (<b>1</b>), and a chromone derivative, botryochromone (<b>2</b>), together with three known chromones, eugenitin (<b>3</b>), 6-hydroxymethyleugenin (<b>4</b>) and 6-methoxymethyleugenin (<b>5</b>), were isolated from cultures of the endophytic fungus BCC 54265 of the family Botryosphaeriaceae. The structures were elucidated on the basis of NMR, HRMS and CD data. Compound <b>2</b> showed weak cytotoxic activity to cancer cell-lines.</p>