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Figure 1 The molecular structure of (I), with the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. [Symmetry codes: (i) −2 − x, 2 − y, 2 − z; (ii) −1 − x, 2 − y, 2 − z; (iii) −1 + x, y, 1 + z; (iiii) −2 − x, 2 − y, 3 − z]. |