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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯Br1	0.89	3.18	3.508 (5)	104
N1—H3⋯Br2	0.89	2.54	3.411 (5)	165
N2—H13⋯Br6	0.89	3.17	3.509 (5)	105
N2—H14⋯Br7	0.89	2.54	3.416 (5)	167
N3—H26⋯Br7	0.89	2.71	3.448 (6)	142
N3—H27⋯Br2	0.89	2.62	3.486 (6)	164
N4—H37⋯Br4	0.89	2.68	3.465 (5)	148
N4—H39⋯Br2	0.89	2.73	3.462 (6)	140