Trichodermatides E and F from fungus .

Two new polyketide derivatives, trichodermatides E () and F (), are unprecedented examples of a polyketide with 6/6/6/6 tetracyclic skeleton, together with five known analogs koninginin B (), koninginin D (), 7-O-methylkoninginin D (), koninginins E and F (-), were isolated from the plant endophytic fungus . The structures of these two compounds were determined by NMR data and HR-ESI-MS analysis. The putative biosynthesis of compounds - was presented.