(S,E)-3-[(2-Hy-droxy-benzyl-idene)amino]-2-(2-hy-droxy-phen-yl)-2,3-dihydro-quinazolin-4(1H)-one.

In the title compound, C21H17N3O3, the dihydro­quinazoline ring adopts a screw-boat conformation and its stereogenic C atom has an S configuration. The dihedral angle between the mean planes of the two hy­droxy­phenyl rings is 86.61 (12)°. The amino H atom forms an intra­molecular hydrogen bond with a phenol O atom, while the hydrazine N atom acts as an acceptor for the H atom of the other phenol group. In the crystal, O—H⋯N and O—H⋯O hydrogen bonds and weak C—H⋯centroid(π-ring) inter­molecular inter­actions are observed, forming chains along [1-10] and [110].