2-Bromo-1,6,6-trimethyl-6,7,8,9-tetra­hydro­phenanthro[1,2-b]furan-10,11-dione

In the title compound, C₁₉H₁₇BrO₃, the ring skeleton is located on a crystallographic mirror plane; two C atoms of the cyclo­hexene ring are disordered over the two locations to satisfy the preferred ring conformation. In the crystal, C—H...O hydrogen bonds link the mol­ecules into chains along the a axis. π–π stacking inter­actions between benzo­quinone rings, with a centroid–centroid distance of 3.7225 (4) Å, are also observed, which connect the chains into a two-dimensional networkparallel to the ab plane.