In the title compound, C20H21NO5, the dihedral angle between the mean planes through the two rings is 47.1 (8)°. The enoate group assumes an extended conformation. The hydroxyethanimine group is essentially coplanar with the benzene ring, the largest deviation from the mean plane being 0.061 (1) Å for the O atom. In the crystal, molecules are linked into cyclic centrosymmetric dimers with an R 2 2(6) motif via pairs of O—HN hydrogen bonds. Intermolecular C—HO hydrogen bonds form a C(8) chain along the b axis. The crystal packing is further stabilized by C—Hπ interactions.