Acta Cryst. (2013). E69, o777 [ doi:10.1107/S1600536813010465 ]
Abstract: In the title compound, C16H10Cl2N4O4, the pyrazine rings make dihedral angles of 67.82 (9) and 75.91 (9)° with the benzene ring, while the dihedral angle between the pyrazine rings is 44.69 (10)°. The methoxycarbonyl group makes a dihedral angle of 16.82 (8)° with the benzene ring to which it is attached. In the crystal, C-HO hydrogen bonds link the molecules, forming chains running along the ab plane.
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