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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H11⋯Br2ii	0.83 (2)	2.53 (8)	3.343 (4)	168 (6)
O1—H12⋯Br1iii	0.83 (2)	2.52 (13)	3.333 (4)	165 (6)
O2—H21⋯Br1iv	0.82 (2)	2.49 (10)	3.307 (4)	172 (6)
O2—H22⋯Br2v	0.83 (2)	2.63 (11)	3.417 (4)	161 (6)
O3—H31⋯Br1vi	0.83 (2)	2.46 (8)	3.288 (4)	173 (6)
O3—H32⋯Br2	0.83 (2)	2.52 (11)	3.328 (5)	163 (6)

Symmetry codes: (ii) ; (iii) ; (iv) ; (v) ; (vi) .