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

Cg1 is the centroid of S1/C1–C4 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N1⋯O2	0.89 (3)	2.06 (3)	2.744 (2)	133 (2)
N1—H2N1⋯O2i	0.87 (2)	2.12 (2)	2.972 (2)	167 (2)
C8—H8A⋯Cg1ii	0.97	2.78	3.600 (2)	142

Symmetry codes: (i) ; (ii) .