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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4B2⋯O2i	0.85	1.97	2.738 (5)	149
O4—H4B2⋯Br1i	0.85	3.07	3.741 (4)	137
O4—H4B1⋯Br1ii	0.85	2.59	3.377 (4)	155

Symmetry codes: (i) ; (ii) .