Table 2. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| O6—H6⋯N2i | 0.85 (1) | 2.01 (1) | 2.853 (4) | 175 (5) |
| O5—H5⋯O4 | 0.82 | 2.20 | 2.646 (4) | 114 |
| O5—H5⋯O7ii | 0.82 | 2.12 | 2.828 (3) | 145 |
Symmetry codes: (i) 
; (ii) 
.
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