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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯N4i	0.86	2.24	3.024 (3)	152
N3—H3⋯O1ii	0.86	2.09	2.850 (3)	147
N4—H4A⋯O1iii	0.89	2.34	3.206 (3)	164

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