| Summary: | In the title compound, C20H15N3O3S, 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 R12(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].
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