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

Cg1 is the centroid of the C13–C18 benzene ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C9—H9⋯O2	0.93	2.27	2.823 (3)	118
N2—H12N⋯O2i	0.85 (3)	2.04 (3)	2.852 (3)	161 (3)
C4—H4⋯Cg1ii	0.93	2.96	3.701 (3)	138

Symmetry codes: (i) ; (ii) .