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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H1N⋯O1i	0.85 (1)	2.10 (1)	2.9177 (15)	163 (2)
N2—H2N⋯O2ii	0.84 (1)	2.23 (1)	2.9757 (15)	148 (2)
N2—H2N⋯O2	0.84 (1)	2.33 (2)	2.8901 (15)	125 (2)

Symmetry codes: (i) ; (ii) .