Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C21—H21A⋯O2i | 0.97 | 2.54 | 3.376 (5) | 145 |
| C17—H17⋯O2i | 0.98 | 2.47 | 3.346 (5) | 149 |
Symmetry code: (i) 
.
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