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Crystals of the title compound, C15H13NO3, are stabilized by N—H...O intermolecular hydrogen bonds and two C—H...π intermolecular interactions. The N—H...O hydrogen bonds generate an R 2 2(12) ring motif and the phthalide part of the molecule is planar. The dihedral angle between the phthalide group and the benzene ring is 71.18 (5)°.doi:10.1107/s1600536806012785 fatcat:p422gdp5efgepkek5jvixwwzai