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Figure 3 Perspective view of the hydrogen-bonded layer. Atoms are drawn as spheres of arbitrary radius, only N—H hydrogen atoms are shown. Symmetry operators: (iii) −x + , y + , −z + ; (iv) −x + , y − , −z + ; (vi) x − , −y + , z + ; (vii) x − , −y + , z + ; (viii) −x, −y + 1, −z + 1. |