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Figure 2 A larger portion of the crystal structure of (I), showing the formation of a hydrogen-bonded tetramers built from C—H⋯O and O—H⋯O. For clarity, H atoms not involved in the hydrogen bonding have been omitted. Dashed lines indicate hydrogen bonds. [Symmetry codes: (A) x, 1 − y, z, (B) 1 − x, 2 − y, 1 − z]. |