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

In the title compound, C(20)H(15)N(3)O(3)S, an intra­molecular C—H⋯O hydrogen bond generates an S(6) ring motif. The chromene ring system is inclined at dihedral angles of 14.21 (9) and 9.91 (10)°, respectively, with respect to the thia­zole and benzene rings. The thia­zole ring makes a dihedral angle of 24.06 (11)° with the benzene ring. In the crystal structure, O—H⋯O hydrogen bonds link the mol­ecules into a zigzag chain along [20[Image: see text]]. Weak N—H⋯O and C—H⋯O inter­actions connect the chains into a three-dimensional network. π–π stacking inter­actions with a centroid–centroid distance of 3.4209 (14) Å are also observed between the chains.