Figure 3 Part of the crystal structure, showing the aggregation of [R_{2}^{2}](12) and [R_{6}^{6}](44) hydrogen-bonding motifs. [Symmetry codes: ([alpha]) -x+1/2, y - [{1\over 2}], -z; ([beta]) -x, -y, -z - 1; (@) -x+1/2, y - [{1\over 2}], -z; (#) x, y - 1, z; (°) x - [{1\over 2}], -y - [{1\over 2}], z - 1; () -x+1/2, y - [{3\over 2}], -z].  [article HTML]