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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O3i	0.890 (10)	2.005 (15)	2.876 (4)	166 (4)
O3—H3⋯Br1	0.82	3.05	3.641 (3)	131
O3—H3⋯O1	0.82	2.62	3.268 (4)	137
O3—H3⋯O1ii	0.82	2.55	3.114 (4)	127
O1—H1⋯N1	0.82	1.87	2.590 (3)	146

Symmetry codes: (i) ; (ii) .