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

Cg1 is the centroid of the C15–C20 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C1—H1⋯O3i	1.00	2.59	3.248 (5)	123 (3)
C2—H2⋯O3i	1.00	2.29	3.115 (5)	139 (3)
C12—H12⋯Cg1ii	0.95	2.94	3.838 (5)	158 (3)
C12—H12⋯C18ii	0.95	2.83	3.585 (6)	138 (3)

Symmetry codes: (i) ; (ii) .