| Summary: | The asymmetric unit of the title compound, C18H17N3O2, comprises three independent molecules (1, 2 and 3). In molecule 1, the dihedral angles between the pyrazolone ring and the pendant phenyl and hydroxybenzene rings are 54.43 (6) and 28.72 (6)°, respectively. The corresponding data for molecule 2 are 86.84 (6) and 25.69 (5)°, respectively, and for molecule 3 are 47.41 (7) and 17.09 (7)°, respectively. The three molecules feature an intramolecular C—H...O interaction, which closes an S(6) ring in each case. In the crystal, molecules are linked by O—H...O hydrogen bonds, which generate [100] chains incorporating all three asymmetric molecules. Two weak C—H...O interactions connect three independent molecules to each other along the c-axis direction.
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