Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H3⋯Br2i	0.96	2.67	3.5239 (16)	148
O2—H22⋯Br2ii	0.96	2.92	3.6365 (14)	133
O2—H22⋯Br1ii	0.96	2.58	3.4004 (13)	144
O2—H21⋯O3iii	0.96	1.82	2.7595 (19)	167
O1—H12⋯O2iv	0.96	1.82	2.7182 (18)	155
O1—H11⋯O2	0.96	1.80	2.7318 (18)	164

Symmetry codes: (i) ; (ii) ; (iii) ; (iv) .