In the title compound, C 16H 12BrNO 3, the butyrolactone core adopts the furan-2(5H)-one structure and forms dihedral angles of 44.80 (17) and 65.73 (18)° with the bromobenzene and phenol rings, respectively. In the crystal, N - H⋯O and O - H⋯O hydrogen bonds link the molecules, generating R 4 3(26) loops The edgefused rings extend to form a chain running along the baxis direction and C - ...