Abstract
The complete molecule of the title compound, C18H22N4O6, is generated by the application of a twofold axis of symmetry. Twists are evident in the molecule, i.e. between each -C=N-N group and the adjacent oxazole ring [dihedral angle = 46.08 (12)degrees] and between the latter and attached ester group [excluding the terminal methyl group; dihedral angle = 24.4 (7)degrees]. In the crystal, C-H center dot center dot center dot O and pi-pi [3.5990 (11) angstrom] contacts connect molecules into supramolecular arrays in the ac plane. These stack along the b axis, being connected by weak pi-pi [3.3903 (11) angstrom] interactions.