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

Cg1 is the centroid of the C12–C17 benzene ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C20—H20B⋯N2	0.96	2.57	2.923 (2)	102
C21—H21C⋯Cg1i	0.96	2.95	3.7193 (16)	138

Symmetry code: (i) .