1,3-Dimethyl-5,6,7,8-tetrahydro-4H-cyclohepta[c]thiophene-4,8-dione

In the title compound, C11H12O2S, the C and S atoms of the central thiophene and the methyl groups, and the two carbonyl groups of the cycloheptanedione are almost coplanar [maximum deviation from the mean plane = 0.221 (2) Å]. The packing is stabilized by π–π interactions between the conjugated thiophenes, the shortest centroid–centroid distance between thiophene rings being 3.9759 (10) Å