4-[(4-Bromo­phenyl)amino]-2-methyl­idene-4-oxo­butanoic acid

In the title compound, C(11)H(10)BrNO(3), two independent mol­ecules (A and B) crystallize in the asymmetric unit. The dihedral angles between the mean planes of the 4-bromo­phenyl ring and amide group are 24.8 (7) in mol­ecule A and 77.1 (6)° in mol­ecule B. The mean plane of the methyl­idene group is further inclined by 75.6 (4) in mol­ecule A and 72.5 (6)° in mol­ecule B from that of the amide group. In the crystal, N—H⋯O hydrogen bonds formed by amide groups and O—H⋯O hydrogen bonds formed by carb­oxy­lic acid groups are observed and supported additionally by weak C—H⋯O inter­actions between the methyl­idene and amide groups. Together, these link the mol­ecules into chains of dimers along [110] and form R (2) (2)(8) graph-set motifs.