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Five new polyketides, including two pairs of enantiomers and a racemate, were isolated from the fermentation broth of Aspergillus fumigatus , an endophytic fungus isolated from Cordyceps sinensis . Their structures were identified using one-dimensional (1D) and two-dimensional (2D) NMR experiments, and the absolute configurations of the enantiomers were confirmed using electronic circular dichroism (ECD) calculations. Compounds 1a and 2a exhibited inhibitory activity against the MV4-11 cell line in vitro, with IC 50 values of 23.95 µM and 32.70 µM, respectively.

Novel Polyketides Produced by the Endophytic Fungus Aspergillus Fumigatus from Cordyceps Sinensis