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Figure 1 View of a fragment of the polymeric structure of (I). Displacement ellipsoids are drawn at the 30% probability level, and hydrogen atoms as sphere of arbitrary radius. Symmetry codes: (i) 1 − x, 1 − y, 1 − z; (ii) x, y, 1 + z; (iii) 1 − x, 1 − y, −z; (iv) 2 − x, 2 − y, 1 − z. |