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Figure 2 Crystal structure of the title compound stabilized by hydrogen bonds N1—H1A⋯O1(i), N1—H1B⋯O2(ii), N2—H2A⋯O4(iii), N2—H2B⋯O1(iv). Symmetry codes: (i) −x + ,y + 1/2,z; (ii) −x + ,y − 1/2,z; (iii) −x + 1,y − 1/2,-z + ; (iv) x + ,-y + ,-z + 1. H atoms not involved in hydrogen bonds have been omitted. |