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Figure 2 A partial packing diagram of the title compound. The dashed lines indicate N—H⋯O and C—H⋯O hydrogen bonds. H atoms of the ethyl groups not involved in the C—H⋯O hydrogen bonds have been omitted. [Symmetry codes: (i) −x + 1, −y + 2, −z; (ii) −x + 1, −y + 1, −z.] |