Table 2. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O5—H5A⋯O6′i | 0.85 | 2.04 | 2.662 (12) | 130 |
| O5—H5B⋯O6i | 0.85 | 2.29 | 2.812 (4) | 120 |
| O6—H6B⋯O4ii | 0.85 | 1.98 | 2.737 (4) | 147 |
| O6′—H6′B⋯O4ii | 0.85 | 2.19 | 2.769 (12) | 125 |
Symmetry codes: (i) 
; (ii) 
.
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