The ZnII ion in the title compound, [Zn(C9H6NO4)2(H2O)4], is located on an inversion center and is octahedrally coordinated by two 2-(2-oxo-2,3-dihydro-1,3-benzoxazol-3-yl)acetate anions in axial sites and four water molecules in equatorial positions. In the crystal, O—H...O hydrogen bonds between the coordinated water molecules and carbonyl–carboxylate O atoms lead to pleated sheets parallel to (001)

The asymmetric unit of the title compound, C22H18N2O2, contains two independent mol­ecules, which differ in the orientations of the benzyl groups with respect to the planar (r.m.s. deviations of 0.031 and 0.020 Å) quinazoline-2,4-dione skeletons [dihedral angles of 73.97 (4) and 70.07 (4)° in the first mol­ecule and 75.63 (4) and 63.52 (3)° in the second]. The crystal structure is stabilized by weak inter­molecular C—H⋯O and C—H⋯π interactions and aromatic π–π stacking inter­actions [centroid–centroid distance = 3.735 (2) Å].