5-Fluoro-1-(penta-noyl)pyrimidine-2,4(1H,3H)-dione.

The penta-noyl group and the 5-fluoro-uracil moiety of the title compound, C(9)H(11)FN(2)O(3), are essentially coplanar, with the penta-noyl carbonyl group oriented towards the ring CH group and away from the nearer ring carbonyl group. In the crystal structure, two inversion-related mol-ecules form a dimer structure, in which two N-H⋯O hydrogen bonds generate an inter-molecular R(2) (2)(8) ring. In addition, there are intra- and inter-molecular C-H⋯O inter-actions.