The 1,3,5-oxadiazinane ring in the title compound, C(12)H(14)F(2)N(4)O(3), has a conformation inter-mediate between half-chair and screw-boat. The crystal structure is stabilized by weak inter-molecular C-H⋯O hydrogen bonds. Weak π-π inter-actions are indicated by the relatively long centroid-centroid distance of 3.9199 (12) Å and inter-planar distance of 3.803 Å between symmetry-related benzene rings from neighbouring mol-ecules.