Hydrogen bonding geometry (Å).

D–H⋯A	D–H	H⋯A	D⋯A	D–H⋯A
N1–H1A⋯O9a	0.97(3)	1.86(3)	2.809(2)	166(2)
N1–H1B⋯Br1b	0.86(3)	2.62(3)	3.426(2)	157(2)
N1–H1C⋯Br02	0.88(3)	2.53(3)	3.379(2)	163(2)

^aSymmetry codes: −x + 3/2, y − 1/2, z.

^b−x + 1, −y + 1/2, z + 1/2.