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Figure 1 Crystal structure of the title compound with labelling and displacement ellipsoids drawn at the 50% probability level. Symmetry codes: i = −x + 1, −y + 2, −z + 1; ii = x − , −y + , −z + 1; iii = −x + , y − , z; iv = x + , −y + , −z + 1; v = −x + , y + , z. |