4-[2-(2-Benzyl­idene­hydrazin­ylidene)-3,6-dihydro-2H-1,3,4-thia­diazin-5-yl]-3-(4-meth­oxy­phen­yl)­sydnone

In the title compound, C(19)H(16)N(6)O(3)S, the 3,6-dihydro-1,3,4-thia­diazine ring adopts a twist-boat conformation. The dihedral angle between the meth­oxy-substituted benzene ring and the oxadiazole ring is 71.91 (7)°. In the crystal structure, centrosymmetrically related mol­ecules are linked into dimers via pairs of inter­molecular N—H⋯N hydrogen bonds, generating R (2) (2)(8) ring motifs. There is an intra­molecular C—H⋯O hydrogen bond which generates an S(6) ring motif.