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Figure 1 The structure of (I), showing the atomic numbering scheme. Displacement ellipsoids are drawn at the 30% probability level. Symmetry codes: (i) 0.5 − x, y − , z; (ii) 0.5 − x, −y, z + ; (iii) x + , y, 0.5 − z; (iv) x, y − 1, z; (v) 1 − x, 1 − y, 1 − z. |