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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O2—H2⋯O5i	0.85 (3)	1.90 (3)	2.739 (4)	171 (4)
O3—H3⋯O1	0.84 (4)	1.91 (5)	2.616 (4)	142 (5)
O3—H3⋯O6ii	0.84 (4)	2.52 (4)	3.063 (5)	123 (4)
O4—H4⋯O1iii	0.85 (4)	1.79 (4)	2.636 (4)	175 (4)
O6—H6⋯O5	0.85 (4)	1.90 (4)	2.642 (4)	146 (5)

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