摘要
The title compound, C17H18N2O4, crystallizes with two independent molecules in the asymmetric unit. The two benzene rings in each molecule make dihedral angles of 7.6 (3) and 3.9 (3)degrees. Intramolecular O-H center dot center dot center dot N and O-H center dot center dot center dot O hydrogen bonds are present in each molecule. In the crystal, N-H center dot center dot center dot O hydrogen bonds link the molecules into chains propagating in [010]. The are also a number of C-H center dot center dot center dot O and pi-pi interactions present [centroid-centroid distances = 3.874 (4) and 3.904 (3) angstrom], that result in the formation of a three-dimensional network.
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