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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N4—H4⋯O3	0.86	2.23	3.008 (10)	150
N2—H2⋯O3	0.86	2.26	2.964 (10)	139