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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1A—H1A1⋯Br1A	0.90	2.46	3.353 (9)	174
N1A—H1A2⋯Br1Bi	0.90	2.60	3.410 (9)	150
N1B—H1B1⋯Br1Bii	0.90	2.46	3.362 (9)	175
N1B—H1B2⋯Br1Aiii	0.90	2.58	3.383 (9)	149
O21—H21⋯Br1A	0.82	2.73	3.487 (10)	153

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