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Figure 1 The molecular structure of the title compound, showing the asymmetric unit extended to show the coordination geometry for the Na+ ion. Displacement ellipsoids are drawn at the 50% probability level. H atoms are represented as small spheres of arbitrary radii (symmetry codes: (i) x + , y − , z; (ii) −x + 2, y, −z + ; (iii) −x + , y − , −z + ). |