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Figure 2 The supramolecular chain in the crystal structure of (I), with the O—H⋯O and N—H⋯O hydrogen bonds, and π–π interactions denoted by dashed lines. Hydrogen atoms not involved in hydrogen bonding have been omitted for clarity. [Symmetry codes: (i) −x, −y + 2, −z; (ii) x, y − 1, z] |