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In the title dihalogenated trichodermin molecule, C17H24Br2O4 (systematic name: 9,10-dibromo-12,13-epoxytrichothec-9-en-4β-yl acetate), the five-membered ring displays an envelope conformation, whereas the two six-membered rings show the same conformation, viz. chair. As for the seven-membered ring, the dihedral angle between the mean planes formed by the four C atoms of the envelope unit and the three C and one O atoms of the six-membered chair is 69.08 (4)°; these two mean planes are nearly perpendicular to the epoxy ring with angles of 87.53 (4) and 88.67 (4)°, respectively.