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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯O2i	0.83 (3)	1.88 (3)	2.710 (2)	171 (3)
O3—H3⋯O2	0.80 (3)	1.92 (3)	2.620 (2)	146 (3)
O4—H4A⋯O5ii	0.93 (3)	1.76 (3)	2.694 (2)	175 (2)
O6—H6⋯O5	0.87 (3)	1.80 (3)	2.606 (2)	154 (3)
C5—H5⋯O6iii	0.93	2.55	3.311 (3)	139

Symmetry codes: (i) ; (ii) ; (iii) .