In the title compound, C17H16N2O3S, the phenylpropanoic acid and the benzoyl moieties adopt a cis–trans conformation, respectively, with respect to the thiono S atom across the C—N bonds. An intramolecular N—H...O hydrogen bond generates an S(6) ring. The crystal structure features carboxylic acid inversion dimers and pairwise N—H...S hydrogen bonds, which together generate [20-1] chains. Weak C—H...O hydrogen bonds are also observed.
