Table 1. Hydrogen-bond geometry (Å, °).
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C4—H4⋯O1i | 0.95 | 2.42 | 3.360 (11) | 172 |
| C16—H16⋯O1ii | 0.95 | 2.41 | 3.332 (9) | 165 |
Symmetry codes: (i) 
; (ii) 
.
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