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

Cg3 is the centroid of the C13–C18 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯Br1i	0.85 (1)	2.54 (1)	3.357 (3)	161 (3)
N1—H1B⋯Br1	0.85 (1)	2.58 (1)	3.413 (3)	166 (3)
C17—H17⋯Br1i	0.93	2.91	3.789 (3)	158
C22—H22⋯Cg3ii	0.93	2.94	3.78 (3)	151

Symmetry codes: (i) ; (ii) .