Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H2⋯O1ii	0.87 (5)	1.93 (5)	2.800 (3)	176 (5)

Symmetry code: (ii) .