Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C3—H3⋯O2i | 0.95 | 2.70 | 3.459 (2) | 137 |
| C5—H5⋯O1ii | 0.95 | 2.66 | 3.406 (2) | 136 |
| C6—H6⋯O2iii | 0.95 | 2.71 | 3.4700 (19) | 138 |
| C9—H9⋯O2iii | 0.95 | 2.55 | 3.3209 (18) | 139 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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