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The crystal structure of the title compound, C16H11F3N4O2S, is stabilized in the form of polymeric chains by N—H...O interactions. In the molecular structure, two S(5) ring motifs are formed by intramolecular N—H...N and N—H...O hydrogen bonding and two S(6) rings are present due to N—H...O and C—H...S interactions. π–π interactions are present with distances of 3.2735 (17), 3.563 (2) and 3.664 (4)/3.688 (3) Å between the centroids of the heterocyclic rings, between the centroids of the heterocyclic ring and trifluoromethoxy-substituted phenyl ring, and between the centroids of the trifluoromethoxy-substituted phenyl rings, respectively. The trifluoromethoxyphenyl group is disordered over two sites with an occupancy ratio of 0.642 (10):0.358 (10).