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Figure 2 A portion of the crystal packing showing hydrogen-bonding patterns with graph-set notations (9), (9) and (12), respectively. Dotted lines denote hydrogen bonds. H atoms non-involved in hydrogen-bonding omitted for clarity. [Symmetry codes: (i) − x, 1 − y, z; (ii) −x, −1 + y, − z; (iii) x, 1 − y, + z; (iv) + x, 2 − y, − z; (v) − x, y, + z; (vi) x, −1 + y, z; (vii) −x, 1 − y, −z; (viii) − x, 2 − y, z; (ix) + x, y, −z.] |