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In the title compound, C16H14O4, there is an intra­molecular O—H...O hydrogen bond. The benzene rings are inclined to one another by 13.89 (9)°. The prop-2-en-1-one group is twisted slightly, the O=C—Car—Car (ar = aromatic) and C=C—C=O torsion angles being −10.4 (3) and −7.4 (3)°, respectively. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, forming chains along [100]. These chains are further linked by O—H...O hydrogen bonds, forming corrugated sheets lying parallel to (010). There are C—H...π inter­actions present within the sheets.
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