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The complete mol­ecule of the title compound, C 18 H 22 N 4 O 6 , 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) °] and between the latter and attached ester group [excluding the terminal methyl group; dihedral angle = 24.4 (7) °]. In the crystal, C—H⋯O and π–π [3.5990 (11) Å] contacts connect mol­ecules into supra­molecular arrays in the  ac  plane. These stack along the  b  axis, being connected by weak π–π [3.3903 (11) Å] inter­actions.

acta crystallographica. section e

Ethyl 5-((1<i>E</i>)-1-{(<i>E</i>)-2-[1-(4-ethoxycarbonyl-3-methyl-1,2-oxazol-5-yl)ethylidene]hydrazin-1-ylidene}ethyl)-3-methyl-1,2-oxazole-4-carboxylate

Ethyl 5-((1E)-1-{(E)-2-[1-(4-ethoxycarbonyl-3-methyl-1,2-oxazol-5-yl)ethylidene]hydrazin-1-ylidene}ethyl)-3-methyl-1,2-oxazole-4-carboxylate