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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯N2i	0.90	2.39	3.224 (2)	154
N2—H2A⋯N1ii	0.90	2.35	3.124 (2)	145

Symmetry codes: (i) ; (ii) .