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In the asymmetric part of the unit cell of the title compound, C16H14N2O4, there are two chemically equivalent but crystallographic independent half mol­ecules. The geometric centre of each complete mol­ecule lies on a crystallographic inversion centre. Both mol­ecules are almost planar [mean deviations of atoms in the two molecules are 0.032 (2) and 0.044 (2) Å] and their geometries are similar. In the crystal, mol­ecules are arranged in columns along the a axis. There are no inter­molecular donor-acceptor distances shorter than 3.4 Å.
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