4-({[6-(4-Chlorobenzyl)-4-methyl-5-oxo-4,5-dihydro-1,2,4-triazin-3-yl]sulfanyl}acetyl)-3-phenylsydnone

In the title syndone (1,2,3-oxadiazol-3-ylium-5-olate) compound, C21H16ClN5O4S, the dihedral angle between the benzene and oxadiazole rings is 55.62 (11)degrees and that between the triazine and the chloro-substituted phenyl rings is 82.45 (9)degrees. There is an intramolecular C-H...S hydrogen bond, which generates an S(5) ring motif. In the crystal, inversion dimers linked by pairs of C-H...O hydrogen bonds generate R (2) 2(20) loops. The dimers are connected by C-H...N and C-H...O hydrogen bonds.