(2Z)-1-(5-Hy­droxy-3-methyl-1-phenyl-1H-pyrazol-4-yl)-3-(4-meth­oxy­anilino)but-2-en-1-one

The central residue in the title compound, C(21)H(21)N(3)O(3), is close to planar (r.m.s. deviation = 0.0753 Å for all non-H atoms from OH to NH inclusive): the hy­droxy, amino and carbonyl groups all lie to the same side of the mol­ecule (the conformation about the ethene bond is Z), facilitating the formation of intra­molecular O—H⋯O and N—H⋯O hydrogen bonds that close S(6) rings. However, overall the mol­ecule is twisted as the terminal aromatic rings are not coplanar with the central plane [dihedral angles = 20.55 (5) and 80.90 (4)° for the N-bound phenyl ring and the meth­oxy­benzene ring, respectively]. The dihedral angle between the rings is 82.14 (7)°. Supra­molecular layers in the ac plane mediated by C—H⋯π inter­actions are found in the crystal.