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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N4—H4N⋯O2i	0.91 (2)	1.91 (2)	2.7860 (17)	160.9 (17)
N2—H2N⋯O4ii	0.912 (19)	1.984 (19)	2.8872 (18)	170.4 (17)
C2—H2⋯O2iii	0.93	2.49	3.4082 (19)	171
C7—H7A⋯O3ii	0.96	2.54	3.458 (2)	159
C10—H10⋯O4iv	0.93	2.45	3.3563 (18)	164

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