Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C5—H5⋯O20i | 0.93 | 2.53 | 3.200 (2) | 129 |
Symmetry code: (i) 
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