Cytosporaphenones D (1) and E (2), two new polyketones, and one new natural product 1,7-dihydroxy-6-methyl-8-formylxanthone (3), along with four known compounds, were isolated from Cytospora rhizophorae, an endophytic fungus from Morinda officinalis. Their structures were elucidated by extensive spectroscopic analyses and X-ray diffraction technique.
Keywords: Cytospora rhizophorae; Morinda officinalis; cytosporaphenones D-E; endophytic fungus.