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Figure 1 . The polymeric structure of the title compound, with displacement ellipsoids drawn at the 30% probability level. Lattice water molecules generated by symmetry are omitted. [Symmetry codes: (A) 3/2-x, 1/2-y, −z; (B) 1-x, y, 1/2-z; (C) + x, 1/2-y, − + z]. |