Crystal structure of methyl 2-hy­droxy-5-[(4-oxo-4,5-di­hydro-1,3-thia­zol-2-yl)amino]benzoate

The title compound, C(11)H(10)N(2)O(4)S, crystallized with two independent mol­ecules (A and B) in the asymmetric unit. They differ primarily in the rotational orientation of the five-membered heterocyclic ring. In mol­ecule A this ring is inclined to the benzene ring by 48.17 (8)°, while in mol­ecule B the same dihedral angle is 23.07 (8)°. In each mol­ecule there is an intra­molecular O—H⋯O hydrogen bond involving the adjacent hydroxyl group and the ester carbonyl O atom. In the crystal, the A mol­ecules are linked via pairs of N—H⋯N hydrogen bonds, forming inversion dimers. These dimers are linked to the B mol­ecules via N—H.·O, C—H⋯O and C—H⋯S hydrogen bonds forming corrugated sheets lying parallel to (102).