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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H3⋯O5	0.84 (2)	2.27 (2)	3.0123 (18)	147.1 (17)
N2—H4⋯O6	0.82 (2)	2.05 (2)	2.7867 (18)	149.1 (18)
N3—H16⋯O3i	0.87 (2)	2.18 (2)	3.0449 (17)	175.9 (18)

Symmetry code: (i) .