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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H4A⋯O2i	0.84 (4)	1.95 (5)	2.776 (5)	162 (4)
O1—H4B⋯Br1ii	0.85 (5)	2.48 (5)	3.312 (3)	167 (4)

Symmetry codes: (i) ; (ii) .