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

Cg3 is the centroid of the C4–C9 benzene ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯O3i	0.91 (1)	1.95 (1)	2.8560 (15)	179 (2)
C12—H12⋯Cg3ii	0.95	2.62	3.5576 (15)	169
C18—H18B⋯Cg3iii	0.99	2.65	3.5726 (14)	155

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