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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯O3i	0.82	1.97	2.781 (3)	170
O2—H2⋯O1ii	0.82	2.33	2.861 (2)	123
O4—H4⋯O2iii	0.82	1.85	2.639 (2)	162
O6—H6⋯O7	0.82	1.76	2.575 (4)	170
O7—H7⋯O5iv	0.82	1.93	2.694 (4)	156

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