Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C3—H3⋯O2i | 0.95 | 2.51 | 3.444 (3) | 169 |
| C9—H9A⋯O2ii | 0.98 | 2.48 | 3.437 (3) | 165 |
| C15—H15⋯O1iii | 0.95 | 2.49 | 3.342 (3) | 149 |
Symmetry codes: (i) 
; (ii) 
; (iii) 
.
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