3-(2,4-Difluoro-anilino)-9-nitro-dibenzo[b,e]oxepin-11(6H)-one.

In the title compound, C(20)H(12)F(2)N(2)O(4), the two benzene rings of the tricyclic unit are oriented at a dihedral angle of 30.6†(1)°. The 2,4-difluoro-anilino residue is oriented at a dihedral angle of 68.2†(1)° with respect to the phen-oxy ring. In the crystal, N-H⋯O hydrogen bonds between the amino group and the carbonyl O atom of the oxepinone ring link the mol-ecules into infinte chains along the c axis.