4-(4-Bromophenyl)-2-methylamino-3-nitro-5,6,7,8-tetrahydro-4H-chromen-5-one

In the title compound, C16H15BrN2O4, the six-membered carbocyclic ring of the chromene moiety adopts an envelope conformation with the disordered methylene C atom as the flap. The pyran ring is almost orthogonal to the chlorophenyl ring, making a dihedral angle of 87.11 (12)degrees. The amine-group N atom deviates significantly from the pyran ring [0.238 (3) angstrom]. The molecular structure is stabilized by an intramolecular N - H center dot center dot center dot O hydrogen bond, which generates an S(6) ring motif. In the crystal, molecules are linked via C - H center dot center dot center dot O hydrogen bonds, which generate C(8) chains running parallel to the b axis. The chains are linked by C - H center dot center dot center dot center dot interactions. The methylene-group C atom of the chromene system that is disordered, along with its attached H atoms and the H atoms on the two adjacent C atoms, has an occupancy ratio of 0.791 (7): 0.209 (7).