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Figure 1 The structures of the two independent molecules of (I), with the atom-numbering schemes. Displacement ellipsoids are drawn at the 50% probability level. Molecule A is at the top and molecule B at the bottom. Unlabelled atoms are related to labelled atoms by the symmetry operator (1-x, y, −z) in molecule A and by (1-x, y, 1-z) in molecule B. |