The title compound, C20H19NO5S2, crystallizes as an almost 2: 1 mixture of two molecular orientations (described as Orient-A and Orient-B). The consequences of these two orientations is the formation of three types of N—H⋯ O hydrogen-bonded dimers in which the (Orient-A+ Orient-A) dimers are likely to be the most stable, while the mixed (Orient-A+ Orient-B) dimers are more frequent. Extra interactions in the form of C—H⋯ O and C—H⋯ ...