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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H1N2⋯O1i	0.928 (18)	1.998 (18)	2.9260 (19)	177.7 (17)
N3—H2N3⋯N1	0.93 (2)	2.22 (2)	2.667 (2)	108.6 (16)
N3—H1N3⋯O1ii	0.97 (2)	1.97 (2)	2.9106 (19)	163.5 (17)

Symmetry codes: (i) ; (ii) .