Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O7—H7C⋯O5iii	0.85 (2)	1.96 (2)	2.777 (4)	161 (4)
O6—H6A⋯O3iv	0.84 (2)	1.88 (2)	2.706 (4)	166 (4)
O6—H6C⋯O1v	0.86 (2)	2.02 (2)	2.868 (4)	169 (4)
O5—H5C⋯O7vi	0.85 (2)	2.01 (2)	2.834 (4)	163 (5)
O5—H5D⋯O6vii	0.86 (2)	2.02 (2)	2.864 (4)	171 (4)
O4—H4⋯O6vii	0.84	1.89	2.726 (4)	178

Symmetry codes: (iii) ; (iv) ; (v) ; (vi) ; (vii) .