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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H3O⋯O2i	0.83 (2)	1.84 (2)	2.666 (3)	176 (5)
N1—H1N⋯O1ii	0.83 (2)	2.10 (2)	2.905 (3)	163 (3)

Symmetry codes: (i) ; (ii) .