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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O4i	0.82 (3)	2.06 (3)	2.871 (2)	171 (3)

Symmetry code: (i) .