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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O3i	0.90 (1)	1.92 (1)	2.820 (2)	177 (2)
N1—H1⋯O2ii	0.89 (1)	2.23 (1)	3.077 (2)	158 (2)

Symmetry codes: (i) ; (ii) .