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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O1i	0.84 (2)	2.17 (2)	3.010 (3)	175 (3)
N2—H2N⋯O3ii	0.89 (2)	1.99 (2)	2.867 (4)	167 (3)

Symmetry codes: (i) ; (ii) .