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Figure 3 . C—H⋯π-electron ring interactions (dotted lines) in the crystal structure of the title compound. Cg denotes the ring centroids. [Symmetry codes: (iii) −x + 2, y − , −z + 2; (iv) −x + 1, y + , −z + 1; (viii) −x + 1, y − , −z + 1; (ix) −x + 2, y + , −z + 2.] |