Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H1N⋯O2i	0.87 (1)	2.35 (2)	2.956 (3)	127 (2)
N2—H2N⋯N3	0.88 (1)	2.36 (3)	2.752 (3)	107 (3)

Symmetry code: (i) .