4,6-Dibenzoylisophthalic acid dimethyl sulfoxide disolvate

In the crystal structure of the title compound, C₂₂H ₁₄O₆2-·2C₂H₆OS, 4,6-dibenzoylisophthalic acid is connected to two dimethyl sulfoxide molecules by strong O-H⋯O=S hydrogen bonds. Weak intermolecular C-H⋯O hydrogen bonds connect molecules into dimers. Intramolecular three-centred C-H⋯O hydrogen bonding is favoured by a syn conformation of both carboxyl groups. The two dimethyl sulfoxide molecules were found to be disordered over two equally populated sites.