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Figure 2 A view of the hydrogen-bonded molecular strands (dashed lines). The strands are aligned parallel to the crystallographic b axis. H atoms not involved in hydrogen bonding have been omitted for clarity. Symmetry codes: (*) x-1,1 + y,z; (**) x,y-1,z; (#)x,1 + y,z; (##) 2 + x,y-1,z; ($)x-1/2, − y,-z; ($$) + x, − y,-z |