6-Bromo-1-[2-(2-oxo-1,3-oxazolidin-3-yl)eth-yl]-1H-imidazo[4,5-b]pyridin-2(3H)-one.

The title compound, C(11)H(11)BrN(4)O(3), features an ethane fragment substituted with an almost planar (r.m.s. deviation = 0.019 Å) imidazo[4,5-b]pyridone ring system and an envelope-shaped oxazolidine unit on separate C atoms. The N-CH(2)-CH(2)-N torsion angle is 52.5 (4)°. In the crystal, pairs of mol-ecules are linked by N-H⋯O hydrogen bonds into centrosymmetric dimers.