Abstract
In the molecule of the title compound, C15H11NO4, the essentially planar phthalide group is oriented at a dihedral angle of 56.78 (5)° with respect to the substituted aromatic ring. An intramolecular N—H⋯O hydrogen bond results in the formation of a non-planar six-membered ring, which adopts a nearly flattened-boat conformation. In the crystal structure, intermolecular C—H⋯O, O—H⋯O and N—H⋯O hydrogen bonds link the molecules, generating centrosymmetric R 2 2(8) and R 2 2(11) ring motifs and forming a three-dimensional network.
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