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Figure 1 The main coordination polyhedra in the title compound, shown as an ellipsoid plot with anisotropic displacement parameters drawn at the 50% probability level. [Symmetry codes: (i) 1 − x, 1 − y, 1 − z; (ii) 1 − x, −y, 1 − z; (iii) x, y, 1 + z; (iv) 2 − x, −y, 1 − z]. |