Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C2—H2A⋯O2i | 0.97 | 2.49 | 3.419 (3) | 161 |
| C5—H5C⋯O2ii | 0.96 | 2.54 | 3.481 (3) | 168 |
Symmetry codes: (i) 
; (ii) 
.
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