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Figure 2 The arrangement of the ions in the crystal structure. The N–H⋯O and C–H⋯O hydrogen bonds are represented by dashed lines, the π-π contacts by dotted lines. H atoms not involved in the interactions have been omitted. [Symmetry codes: (i) −x + 1, y + , −z + ; (ii) −x, −y + 2, −z + 1; (iii) −x + 1, −y + 2, −z + 1.] |