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In the title compound, C17H18O5, the pyrogallol group is almost coplanar with the mean plane of the attached carbonyl group [dihedral angle of 1.95 (13)°] and makes a dihedral angle of 56.01 (10)° with the other benzene ring. Of the three methoxy groups, only one is significantly twisted relative to its attached benzene ring [C—O—C—C torsion angles of 4.0 (5), 3.9 (6) and −106.3 (4)°]. Intramolecular O—H...O and C—H...O hydrogen bonds help to establish the conformation, and the packing is consolidated by C—H...O interactions and π–π stacking interactions [centroid–centroid separation = 3.735 (2) Å].