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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N3—H2N3⋯O1	0.88 (2)	2.09 (2)	2.784 (2)	135 (2)
N3—H1N3⋯N2i	0.91 (2)	2.20 (3)	3.098 (2)	169 (2)
N1—H1N1⋯O1ii	0.90 (2)	1.98 (2)	2.866 (2)	168 (3)

Symmetry codes: (i) ; (ii) .