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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2A⋯N4i	0.86	2.23	3.079 (4)	172
O2—H2B⋯N3ii	0.82	1.83	2.640 (4)	168

Symmetry codes: (i) ; (ii) .