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Figure 1 . Molecular structure of the title compound. Displacement ellipsoids are shown at the 50% probability level. [Symmetry codes: (i) 1/3+x-y, −1/3+x, 2/3-z; (ii) 1-y, x-y, z; (iii) 4/3-x, 2/3-y, 2/3-z; (iv) 1-x+y, 1-x, z; (v) 1/3+y, 2/3-x+y, 2/3-z.] |