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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1N⋯O6	0.84 (2)	2.02 (2)	2.836 (4)	162 (4)
N2—H2N⋯O5i	0.85 (2)	2.10 (2)	2.937 (4)	173 (4)

Symmetry code: (i) .