(E)-3-(2-{2-[1-(3-Hy­droxy­phen­yl)ethyl­idene]hydrazin­yl}-1,3-thia­zol-4-yl)-2H-chromen-2-one

In the title compound, C(20)H(15)N(3)O(3)S, the thia­zole ring is approximately planar, with a maximum deviation of 0.003 (1) Å, and makes dihedral angles of 7.44 (6) and 1.88 (6)° with the hy­droxy-substituted phenyl ring and the pyran ring, respectively. The hydroxyl group is disordered over two sets of sites, with an occupancy ratio of 0.567 (3):0.433 (3). In the crystal, the major disorder component mol­ecules are connected via bifurcated (three-centre) O—H⋯O and C—H⋯O hydrogen bonds, generating R (1) (2)(6) motifs and resulting in supra­molecular chains along the a axis. In the minor occupancy component, however, mol­ecules are connected via C—H⋯O hydrogen bonds, forming supra­molecular chains along the b axis. Furthermore, the crystal structure is stabilized by π–π inter­actions between the thia­zole rings [centroid–centroid distance = 3.5476 (7) Å].