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The title compound, C 18 H 20 Br 2 N 2 O 2 , the heterocyclic ring adopts a chair conformation. The benzene rings make dihedral angles of 86.84 (10) and 60.73 (10)° with the mean plane of the heterocyclic ring. The dihedral angle between the two benzene rings is 79.77 (10)°. The mol­ecular structure is stabilized by two intra­molecular hydrogen bonds between the phenolic hy­droxy groups and N atoms with graph-set motif  S (6). The crystal structure is stabilized by weak C—H⋯π inter­actions.

2,2′-[1,3-Diazinane-1,3-diylbis(methylene)]bis(4-bromophenol)