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Figure 4
The crystal packing, showing the co-operative C—H⋯O hydrogen-bonded polymeric association of isostructural compounds (II) and (III) , viewed along the a axis. The representative diagram corresponds to the packing in (II) . Atoms labelled with an asterisk (*) or a hash (#) are at the symmetry positions (−x + 1, −y + 1, −z + 1) and (x + 1, y, z), respectively. Intermolecular C—H⋯O hydrogen bonds are shown as dashed lines. |


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