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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O7—H7A⋯O3i	0.842 (10)	1.960 (11)	2.798 (3)	173 (3)
O7—H7B⋯O4ii	0.845 (10)	1.942 (12)	2.772 (3)	167 (3)
O8—H8A⋯O2	0.854 (10)	1.855 (13)	2.677 (3)	161 (3)
O8—H8B⋯N3iii	0.847 (10)	2.021 (15)	2.830 (4)	159 (3)
O9—H9B⋯O4i	0.849 (10)	1.810 (13)	2.645 (3)	167 (3)
O9—H9C⋯O3	0.849 (10)	1.968 (13)	2.801 (3)	167 (3)

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