Table 1. Hydrogen-bond geometry (Å, °).

Cg2 is the centroid of the N3/N4/C10/C9/S1 thia­diazine ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N3—H1⋯N2i	0.88	2.00	2.8841 (9)	174
C1—H1A⋯O2ii	0.93	2.59	3.4898 (10)	162
C9—H9B⋯O2	0.97	2.41	3.0433 (10)	123
C18—H18A⋯Cl1iii	0.93	2.77	3.6978 (7)	173
C19—H19B⋯Cg2iv	0.96	2.79	3.5792 (11)	140

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .