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Figure 4 A portion of the crystal packing showing π–π stacking interactions by dashed lines. Cg1, Cg2 and Cg3 are centroids of C1/N1/C2/N3/N4, C2/N2/C3—C5/N3 and C6—C11 cycles, respectively. Symmetry codes: (A) −x + 2, −y, −z; (B) −x + 2, −y, −z + 1. |