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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2D⋯O1	0.94 (3)	2.08 (3)	2.538 (2)	108.3 (19)
N2—H2C⋯O2i	0.89 (3)	2.10 (3)	2.988 (2)	173 (3)
O1—H1⋯N1ii	0.82	2.04	2.764 (3)	147

Symmetry codes: (i) ; (ii) .