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Figure 2 Part of the crystal structures, showing the formation of dimers via N—H⋯O hydrogen bonds, and the aggregation of (10), (8) and (13) motifs [Symmetry codes: (i) −x + 1, −y + 1, −z + 1; (ii) x + 1, y, z]. For the sake of clarity, the water molecules in (I), and H atoms not involved in hydrogen bonding have been omitted. Only atoms involved in hydrogen bonding are labelled. |