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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H11⋯O1i	0.88 (1)	2.05 (1)	2.911 (2)	165 (2)
N1—H12⋯O1ii	0.89 (1)	2.22 (1)	3.064 (3)	157 (2)

Symmetry codes: (i) ; (ii) .