Table 1. Hydrogen-bond geometry (Å, °).

Cg4 is the centroid of the C13–C18 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C15—H15A⋯O1i	0.93	2.42	3.291 (3)	155
C18—H18A⋯O2ii	0.93	2.56	3.490 (3)	173
C9—H9A⋯Cg4iii	0.93	2.89	3.758 (3)	155

Symmetry codes: (i) ; (ii) ; (iii) .