4-[(3-Oxo-1,3-dihydro-2-benzofuran-1-yl)amino]­benzoic acid

In the title compound, C15H11NO4, the dihedral angle formed by the benzene ring and the essentially planar 2-benzofuran ring system is 55.93 (3)°. In the crystal, inter­molecular O—H⋯O hydrogen bonds link pairs of mol­ecules, generating centrosymmetric R 2 2(8) ring motifs. These dimeric units are connected via N—H⋯O hydrogen bonds, forming C(6) chains along [100]

4-(2-Sulfanyl­idene-1,3-benzothia­zol-3-yl)butan-2-one

In the title compound, C11H11NOS2, the benzine ring is coplanar with the thia­zole ring, making a dihedral angle of 0.81 (1)°. In the crystal, adjacent mol­ecules are connected into a helical chain along the b axis by S⋯S contacts [3.4345 (18) Å]. These helical chains are further assembled into a three-dimensional supermolecular network by inter­molecular C—H⋯O hydrogen bond between aromatic ring H atoms and carbonyl groups