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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯O1i	0.86 (1)	2.30 (1)	3.143 (4)	168 (4)
N1—H1A⋯Br1ii	0.86 (1)	2.61 (1)	3.454 (3)	166 (3)
C4—H4⋯Br1	0.93	2.82	3.743 (3)	173
C7—H7B⋯Br1iii	0.97	2.82	3.595 (3)	137
C5—H5⋯O2iv	0.93	2.36	3.271 (4)	167
C3—H3⋯O1i	0.93	2.27	3.150 (4)	157

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