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Figure 2 . Part of the crystal structure of (I) showing zigzag chains of molecules linked by intermolecular N—H⋯O hydrogen bonds, represented by dashed lines. Symmetry codes (i): −x,-y + 2,-z + 1; (ii) −x + 1,-y + 1,-z + 1. H atoms not involved in intermolecular hydrogen bonding have been omitted. |