Acta Cryst. (2013). E69, o1203-o1204 [ doi:10.1107/S1600536813018345 ]
Abstract: The title compound, C16H16N4O7, is close to being planar, with a dihedral angle of 3.15 (11)° between the benzene rings. The methoxy groups at the ortho- and para-positions of the 2,4,5-trimethoxyphenyl group are almost coplanar with the ring [deviations of the C atoms = 0.017 (2) and -0.025 (2) Å, respectively], whereas the meta-methoxy group deviates slightly [C-atom displacement = 0.162 (2) Å]. Both the ortho- and para-nitro groups are close to being coplanar with their attached ring [dihedral angles = 7.81 (12) and 8.56 (11)°, respectively]. An intramolecular N-HO hydrogen bond generates an S(6) ring motif. In the crystal, inversion dimers linked by pairs of N-HO hydrogen bonds involving the same H atom as the intramolecular bond generate R22(12) loops. The dimers are linked by weak C-HO interactions into sheets parallel to the (10-4) plane and the sheets are stacked by - interactions, with a centroid-centroid distance of 3.5974 (14) Å.
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