Crystal structure of 2-amino-7-hydroxy-4-(4-hydroxyphenyl)-4H-chromene-3-carbonitrile

In the title compound, C16H12N2O3, the chromene ring system is nearly planar [maximum deviation from the mean plane = 0.057 (1) angstrom], and is almost perpendicular to the benzene ring, with a dihedral angle of 85.29 (5)degrees. In the crystal, molecules are linked by classical N-H center dot center dot center dot O, O-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds, and weak C-H center dot center dot center dot O hydrogen bonds, forming a three-dimensional supramolecular network. Furthermore, a weak pi-pi stacking interaction is observed; the centroid-to-centroid distance is 3.7260 (7) angstrom