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Figure 2 Part of the crystal structure of (I) showing intermolecular C—H⋯O hydrogen bonds (dotted lines), forming C(4) chains along the b axis. For clarity H atoms involved in the hydrogen bonds are shown. [Symmetry codes:(i)3/2 − x, 1/2 + y, z; (ii)x, 1 + y, z; (iii)3/2 − x, 3/2 + y, z]. |