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Figure 4 A larger portion of the crystal structure of (I), showing the formation π⋯π chain. For clarity, H atoms have been omitted. Dashed lines indicate π⋯π stacking interactions. [Symmetry codes: (A) 2 − x, 1 − y, 1 − z, (F) x, −1 + y, z, (G) 2 − x, 2 − y, 1 − z]. |