3-(p-Tol­yl)-4-{3-[(phenyl­amino)­meth­yl]-7H-[1,2,4]triazolo[3,4-b][1,3,4]thia­diazin-6-yl}sydnone

In the title compound, C(20)H(17)N(7)O(2)S (systematic name: 3-(4-methyl­phen­yl)-4-{3-[(phenyl­amino)­meth­yl]-7H-1,2,4-triazolo[3,4-b][1,3,4]thia­diazin-6-yl}-1,2,3-oxadiazol-3-ium-5-olate), the 3,6-dihydro-2H-1,3,4-thia­diazine ring adopts a half-boat conformation. The oxadiazol-3-ium ring makes dihedral angles of 57.99 (6) and 54.48 (6)° with the phenyl and benzene rings, respectively, while the 1,2,4-triazole ring forms corresponding angles of 37.35 (6) and 73.89 (6)°. The dihedral angle between the oxadiazol-3-ium and 1,2,4-triazole rings is 21.12 (6)°. In the crystal, the mol­ecules are linked via inter­molecular N—H⋯O and C—H⋯N hydrogen bonds into a layer parallel to the (100) plane. The crystal structure is further consolidated by C—H⋯π inter­actions. An intra­molecular C—H⋯O hydrogen bond is also observed, which generates an S(6) ring motif.