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The title compound is a new amino­coumarin derivative, C 17 H 13 NO 4 , and was synthesized by the condensation of 2-amino­phenol and 3-acetyl-4-hy­droxy­coumarin. An intra­molecular N—H⋯O hydrogen bond generates an  S (6) ring motif. In the crystal, the molecules are linked into chains extending in the [010] direction by O—H⋯O hydrogen bonds. There is also a π–π stacking inter­action between the bicyclic coumarin fragment and the phenol ring [centroid–centroid distance = 3.7510 (14) Å], and these ring systems form between them a dihedral angle of 53.3 (2)°. Intermolecular hydrogen bond C—H⋯O hydrogen bonding is also observed in the interconnection of the crystal packing.

3-[1-(2-Hydroxyanilino)ethylidene]-3H-chromen-2,4-dione