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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O1i	0.84 (2)	2.05 (2)	2.8778 (16)	168.9 (19)
N1—H1B⋯O1	0.89 (2)	2.08 (2)	2.7168 (16)	127.7 (15)

Symmetry code: (i) .