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Figure 1 The structure of the title compound. Displacement ellipsoids are drawn at the 30% probability level. The hydroxyl groups (O5 and O6) of the tartarate anion are half-occupied. The disordered H atoms attached to C13 have been omitted. [Symmetry codes: (i) 2 − x, −y, −z; (ii) 1 − x, 1 − y, 1 − z.] |