Acta Cryst. (2014). E70, o62-o63 [ doi:10.1107/S1600536813032996 ]
Abstract: There are two independent molecules in the asymmetric unit of the title compound, C16H17NO4, with similar conformations but some differences in their bond angles. Each molecule adopts a trans configuration with respect to the methylidene C=N bond and is twisted with a dihedral angle between the two substituted benzene rings of 80.52 (7)° in one molecule and 83.53 (7)° in the other. All methoxy groups are approximately coplanar with the attached benzene rings, with Cmethyl-O-C-C torsion angles ranging from -6.7 (2) to 5.07 (19)°. In the crystal, independent molecules are linked together by O-HN and O-HO hydrogen bonds and a - interaction [centroid-centroid distance of 3.6030 (9) Å], forming a dimer. The dimers are further linked by weak C-HO interactions and another - interaction [centroid-centroid distance of 3.9452 (9) Å] into layers lying parallel to the ab plane.
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