A new compound from an endophytic fungus Bambusicola massarinia.

One new chromone, rel-(1S,2S,3S)-2,8-dihydroxy-6-methoxy-1,3-dimethyl-3,4-dihydro-1H-xanthen-9(2H)-one (1), together with one known compound wentiquinone A (2), were isolated from solid culture of endophytic fungus strain Bambusicola massarinia. The structures of all compounds were determined mainly by analysis of their NMR spectroscopic data. The relative configuration of compound 1 was determined by the single-crystal X-ray diffraction analyses.