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The title compound, C 17 H 13 Br 2 N 3 O·C 4 H 5 NO 2 , is a co-crystal of N -(7-di-bromo-methyl-5-methyl-1,8-naphthyridin-2-yl)benzamide and pyrrolidine-2,5-dione (succinimide). The benzamide mol-ecule exhibits pseudo-mirror symmetry, with an r.m.s. deviation of the non-H atoms of 0.09 Å (except for the two Br atoms). The angle between the least-squares planes of the two mol-ecules is 26.2 (2)°. In the crystal, the two mol-ecules are mutually linked by N-H⋯O and N-H⋯N hydrogen bonds. The packing is consolidated by C-H⋯(O,N) hydrogen bonds and π-π stacking inter-actions.

The mol-ecule of the title 1,8-naphthyridine-BF 2 derivative, C 12 H 10 BBr 2 F 2 N 3 O, is located on a mirror plane running parallel to the entire ring system and the attached methyl C atoms. Individual mol-ecules are stacked along the b- axis direction. The cohesion in the crystal structure is accomplished by C-H⋯F hydrogen bonds and additional off-set π-π inter-actions [centroid-to-centroid distance = 3.6392 (9) Å, slippage 0.472 Å], leading to the formation of a three-dimensional supra-molecular network.