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Figure 1 The molecular structure showing the atomic-numbering scheme. Displacement ellipsoids drawn at the 30% probability level. H atoms have been omitted for clarity. [Symmetry codes: (i) 1-x, y, 3/2-y; (ii) 1/2-x, y − , 1/2-z; (iii) 1/2-x, 1/2-y, 1-z] |