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Figure 2 A part of the crystal structure of (I), showing the one-dimensional chain-like supramolecular structure. Dashed lines indicate C-H⋯O hydrogen bonds. For the sake of clarity, H atoms not involved in the hydrogen bonds have been omitted. Atoms marked with asterisk (*), hash (#) and dollar ($) signs are at the symmetry positions (−x + , −y + , −z + 1), (x, y, z − 1) and (−x + , −y + , −z), respectively. |