title: 4-(2-Thienylmethyl-eneamino)benzoic acid.
abstract: In the title mol-ecule, C(12)H(9)NO(2)S, the dihedral angle between benzene and thio-phene rings is 41.91 (8)°. The crystal packing exhibits short inter-molecular O-H⋯O and C-H⋯O hydrogen-bonding contacts.
authors.forename: Hui
authors.initials: H
authors.lastname: Cui
authors.forename: Xuquan
authors.initials: X
authors.lastname: Tao