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Figure 1 The molecular structure of title compound with the atom numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. H atoms are presented as a small spheres of arbitrary radius. Symmetry codes: (i) −x + 1, y, −z − ; (ii) x, y + 1, z; (iv) −x, y, −z − ; (vii) 1 + x, y, z. |