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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.85 (1)	1.83 (2)	2.658 (3)	166 (5)
N2—H2⋯O1i	0.88 (1)	2.06 (1)	2.928 (3)	172 (3)

Symmetry code: (i) .