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Figure 2 Linear association of molecules in crystal of 1 through the O–H⋯O hydrogen bonds and C–H⋯π interactions between adjacent chains. The Cg2 refers to the center of gravity between atoms C15/C16. Symmetry codes: (i) –x + , y–1/2, –z + ; (vi) –x + , y–1/2, –z + . |