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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯N4i	0.86	2.47	3.214 (4)	145
N1—H1B⋯N2ii	0.86	2.43	3.166 (4)	144

Symmetry codes: (i) ; (ii) .