9-(2,4-Di­fluoro­phen­yl)-3,3,6,6-tetra­methyl-3,4,5,6,7,9-hexa­hydro-2H-xanthene-1,8-dione

In the title compound, C(23)H(24)F(2)O(3), the central pyran ring has a flat-boat conformation, whereas the two fused cyclo­hexenone rings adopt envelope conformations, with the C atom bearing the dimethyl substituent being the flap atom in each case. The pyran ring mean plane and the di­fluoro­phenyl ring are almost normal to each other, making a dihedral angle of 87.55 (4)°. In the crystal, mol­ecules are linked by pairs of C—H⋯O hydrogen bonds, forming inversion dimers with an R (2) (2)(8) ring motif. The F atom at position 2 on the di­fluoro­phenyl ring is disordered over the 2- and 6-positions, and has a refined occupancy ratio of 0.932 (3):0.068 (3).