Table 1. Hydrogen-bond geometry (Å, °).
Cg3 is the centroid of the C13–C18 ring.
| D—H⋯A | D—H | H⋯A | D⋯A | D—H⋯A |
|---|---|---|---|---|
| C7—H7A⋯O2i | 0.97 | 2.50 | 3.402 (4) | 155 |
| C9—H9A⋯Cg3ii | 0.97 | 2.67 | 3.613 (2) | 165 |
Symmetry codes: (i) 
; (ii) 
.
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