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

CgB is the centroid of ring C4–C9.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C18—H18⋯CgBi	0.95	2.97	3.661 (2)	131

Symmetry code: (i) x, y+1, z.