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Figure 2 Part of the crystal structure of (I), showing the formation of hydrogen-bonded (18) motifs. H atoms not involved in hydrogen bonds have been omitted for clarity. Dashed lines indicate hydrogen bonds. [Symmetry codes: (i) x, 1 + y, z; (ii) 1 − x, + y, − z; (iii) 1 − x, y − , − z]. |