Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O1	0.86	1.99	2.830 (6)	165
N4—H4⋯O3	0.86	2.18	2.964 (8)	152