Crystal structure and Hirshfeld surface analysis of 1-{[2-oxo-3-(prop-1-en-2-yl)-2,3-di­hydro-1H-1,3-benzo­diazol-1-yl]meth­yl}-3-(prop-1-en-2-yl)-2,3-di­hydro-1H-1,3-benzo­diazol-2-one

In the title compound, C(21)H(20)N(4)O(2), the intra­molecular C—H⋯O hydrogen-bonded benzo­diazo­lone moieties are planar to within 0.017 (1) and 0.026 (1) Å, and are oriented at a dihedral angle of 57.35 (3)°. In the crystal, two sets of inter­molecular C—H⋯O hydrogen bonds generate layers parallel to the bc plane. The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H⋯H (51.8%), H⋯C/C⋯H (30.7%) and H⋯O/O⋯H (11.2%) inter­actions.