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Figure 1 The asymmetric unit of the title compound showing the atomic-numbering scheme and displacement ellipsoids drawn at the 30% probability level. Symmetry codes: (A) x, 1 + y, z; (B) 1 − x, 1 − y, −z; (C) 1 − x, −y, 1 − z; (D) −1 + x, −1 + y, z. |