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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O1i	0.84 (2)	2.02 (2)	2.861 (2)	177 (2)
N2—H2⋯O3ii	0.82 (2)	2.10 (2)	2.918 (2)	172 (2)
N5—H5⋯O2	0.85 (2)	1.88 (2)	2.730 (2)	172 (2)

Symmetry codes: (i) ; (ii) .