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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯Br3ii	0.86	2.54	3.354 (9)	159
N2—H2B⋯Br3ii	0.86	2.88	3.612 (12)	144
N3—H3A⋯Br2ii	0.86	2.79	3.608 (10)	160
N3—H3B⋯Br1iii	0.86	2.82	3.604 (10)	153

Symmetry codes: (ii) ; (iii) .