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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O1i	0.834 (18)	2.124 (18)	2.8742 (14)	149.7 (13)
N2—H2N⋯O1i	0.864 (18)	2.119 (18)	2.8904 (14)	148.4 (15)

Symmetry code: (i) .