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Figure 3
Part of the crystal structure of 4 viewed along the b-axis direction. H atoms not involved in C—H⋯N weak hydrogen bonds are omitted for clarity. Dashed lines represent weak hydrogen bonds. Colour scheme: C, grey; H, white; Br, dark yellow; N, blue; O, red. Symmetry codes: (ii) −x + 2, −y + 1, −z + 1; (iii) −x + 1, −y + 2, −z + 1. |

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