Figure 2 Part of the crystal structure, showing the formation of D(3) and D22(7) hydrogen-bonding motifs. [Symmetry codes: (@) x - [{1\over 2}], y + [{1\over 2}], z - 1; ([beta]) x - [{1\over 2}], y + [{3\over 2}], z - 1; ([alpha]) x - [{1\over 2}], -y + [{3\over 2}], z - [{3\over 2}]].  [article HTML]