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Figure 1 Molecular structure diagram for I, showing the numbering scheme. Displacement ellipsoids are drawn at the 25% probability level and H atoms are shown as spheres of arbitrary radii. Symmetry codes (i): –x + 1, –y + 1, –z + 1; (ii) x + 1, y, z; (iii): –x, –y + 1, –z + 1. |