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Figure 1 Molecular structure of the title compound, showing the atom labelling scheme for the asymmetric unit and extended to show the coordination geometry for the K+. The displacement ellipsoids are drawn at the 50% probability level. The H atoms are represented as small spheres of arbitrary radii. Symmetry codes: (i) x +1/2, y, z −1/2; (ii) − x +1/2, − y, z −1/2". |