Abstract
In the title molecule, C11H13N3O, the propyl group is almost perpendicular to the quinazolin-4(3H)-one mean plane, making a dihedral angle of 88.98 (9)degrees. In the crystal, molecules related by an inversion centre are paired via pi-pi overlap, indicated by the short distances of 3.616 (5) and 3.619 (5) angstrom between the centroids of the aromatic rings of neighbouring molecules. Intermolecular N-H center dot center dot center dot N and N-H center dot center dot center dot O hydrogen bonds form R-6(6)(30) rings and C(5) chains, respectively, generating a three-dimensional network. Weak C-H center dot center dot center dot O interactions are also observed.