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

Cg3 is the centroid of the C15–C20 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C6—H6⋯O1i	0.93	2.53	3.446 (3)	170
C11—H11⋯N2ii	0.93	2.59	3.435 (3)	152
C16—H16⋯O1iii	0.93	2.54	3.465 (3)	177
C1—H1B⋯Cg3iv	0.96	2.82	3.626 (3)	142

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