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Figure 2 A view of (I) showing the two-dimensional framework constructed via O—H⋯ O and O—H⋯ N hydrogen bonds. Hydrogen bonds are depicted as dashed lines [symmetry code: (i) −x + , y − , z; (ii) −x + 1,-y + 1,-z + 1]. The tert-butyl groups and all H atoms not involved in hydrogen bonds were omitted for clarity |