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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯O4i	0.88	2.07	2.926 (2)	163
N2—H2A⋯N1i	0.88	2.64	3.175 (2)	120
N2—H2B⋯O1Sii	0.88	2.05	2.872 (2)	154
O1S—H1S⋯O4	0.84	1.88	2.716 (2)	172

Symmetry codes: (i) ; (ii) .