In the title compound, C14H12N2O3, the dihedral angle between the two benzene rings is 21.70 (4)°. An intramolecular O—H...N hydrogen bond generates an S(6) ring motif. In the crystal structure, the molecules are linked by intermolecular O—H...O, N—H...O and C—H...O hydrogen bonds into a three‐dimensional framework.
In the title compound, C23H22O6, the xanthene ring system is essentially planar and the chromene ring is in a screw‐boat conformation. Position 1 of the 1,1‐dimethyl‐2‐propenyl substituent is coplanar with the attached ring. O—H⋯O intramolecular hydrogen bonds are observed in the structure. The molecules form centrosymmetric hydrogen‐bonded dimers via weak intermolecular C—H⋯O interactions. The molecules are linked by intermolecular O—H⋯O hydrogen bonds to form a one‐dimensional chain along [010].
Key indicatorsSingle-crystal X-ray study T = 100 K Mean (C-C) = 0.004 Å R factor = 0.048 wR factor = 0.126 Data-to-parameter ratio = 22.7 For details of how these key indicators were automatically derived from the article, see
Key indicatorsSingle-crystal X-ray study T = 100 K Mean (C-C) = 0.001 Å Disorder in main residue R factor = 0.029 wR factor = 0.075 Data-to-parameter ratio = 40.9For details of how these key indicators were automatically derived from the article, see
Key indicatorsSingle-crystal X-ray study T = 100 K Mean (C-C) = 0.001 Å R factor = 0.050 wR factor = 0.137 Data-to-parameter ratio = 34.6For details of how these key indicators were automatically derived from the article, see
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