Butyl 2-(5-bromo-3-methyl-sulfinyl-1-benzofuran-2-yl)acetate.

In the title compound, C(15)H(17)BrO(4)S, the methyl-sulfinyl O atom and the methyl substituents lie on opposite sides of the plane through the benzofuran fragment. The crystal structure is stabilized by π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.698 (4) Å], and by C-H⋯π inter-actions between a methyl-ene H atom of the butyl group and the benzene ring of the benzofuran system. Additionally, the crystal structure exhibits weak inter-molecular C-H⋯O contacts. The butyl group is disordered over two positions, with site-occupancy factors, from refinement, of 0.720 (8) and 0.280 (8).