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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O3—H3⋯O2i	0.88 (3)	1.94 (3)	2.800 (2)	164 (3)
O2—H2⋯O1ii	0.81 (3)	1.95 (3)	2.7600 (19)	180 (3)

Symmetry codes: (i) ; (ii) .