The title compound, C11H14O3, was synthesized by a cross-metathesis reaction. The dihedral angle between the aromatic ring and the butenol side chain is 30.2 (2)°. In the crystal, inversion dimers are formed through O—H...O hydrogen bonds and these are linked into chains by additional O—H...O contacts. These chains are linked into sheets in the bc plane by C—H...O hydrogen bonds.
