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Figure 2 A view of the N—H⋯O interactions (dotted lines) in the crystal structure of the title compound. H atoms non–participating in hydrogen- bonding were omitted for clarity. [Symmetry codes: (i) − x + , y − , z; (ii) − x + , y + , z; (iii) − x + , y + , z; (iv) − x + , y − , z.] |