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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O2i	0.91 (5)	2.02 (5)	2.922 (4)	175 (4)
N2—H2N⋯O3ii	0.88 (4)	2.03 (5)	2.906 (4)	173 (4)

Symmetry codes: (i) ; (ii) .