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Figure 2 The packing motif of (I), showing the centrosymmetric (20) motif between CT and DMA (residue B) molecules, as well as the N—H⋯O contact between CT and disordered DMA residue C. Hydrogen bonds are shown as dashed lines and minor disorder components have been omitted for clarity. [Symmetry codes:(i) 1 − x, 2 − y, 1 − z; (ii) − x, + y, − z; (iii) + x, − y, − + z.] |