Vimala, GGovindaraj, JHaribabu. JKarvembu, RSubbiahpandi, A2026-08-172026-08-172014-10-081600-5368https://doi.org/10.1107/S1600536814021667http://nitt.ndl.gov.in/handle/123456789/196In the title compound, C12H11N3O2S, the dihedral angle between the 4H-chromen-4-one ring system and the -CH=N - NH - CS - NH- unit is 6.22 (1)°. In the crystal, inversion dimers linked by pairs of N - H⋯O hydrogen bonds generate R 2/2(14) loops. The dimers are reinforced by a pair of C - H⋯O interactions, which generate R 2/2(10) loops.enArticle