Crystal structure of 4-[(E)-(4-hy­droxy­benzyl­idene)amino]-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one

The asymmetric unit of the title compound, C(18)H(17)N(3)O(2), 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.