Figure 6
Packing of polymorph (II): three chains at x = 1, y = 1 (top), x = ½, y = ½ (centre), and x = 0, y = 0 (bottom). Hydrogen bonds are indicated by dashed lines. Symmetry codes: (i) 1-x, 1-y, z; (ii) x, y, 1+z.  [article HTML]

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