Experimental Crystal data

R factor = 0.061; wR factor = 0.161; data-to-parameter ratio = 12.3. In the title compound, C12H11N3O3, the dihedral angle between the 3-nitrobenzaldehyde and 5-amino-3,4-dimethyl-1,2-oxazole moieties is 2.46 (12). The molecule is close to planar, the r.m.s. deviation for the non-H atoms being 0.028 Å. The packing only features van der Waals interactions between the molecules. Related literature For background and related crystal structures, see: Asiri et al