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Figure 2 Intermolecular contacts, viewed along [0 0 − 1]. Intermolecular C–H⋯O contacts are depicted with green dashed lines, intramolecular N–H⋯O hydrogen bonds are depicted with blue dashed lines. Symmetry operators: (i) −x + , −y + , −z; (ii) −x + , −y + , −z. |