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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯N3i	0.86	2.15	2.996 (2)	169
N2—H2⋯O1ii	0.86	2.06	2.8422 (19)	151
N3—H3B⋯O1iii	0.91 (3)	2.12 (3)	3.023 (3)	168 (2)

Symmetry codes: (i) ; (ii) ; (iii) .