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

Cg1, Cg2 and Cg3 are the centroids of the N1–N3/C1/C16, N1/C1/C2/C7–C9 and C2–C7 rings, respectively.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C6—H6⋯N2i	0.93	2.59	3.514 (2)	170
C8—H8⋯N3i	0.93	2.62	3.496 (2)	156
C18—H18⋯Cg1ii	0.93	2.70	3.4524 (17)	138
C21—H21⋯Cg3iii	0.93	2.89	3.7139 (19)	149
C22—H22⋯Cg2iii	0.93	2.90	3.5442 (18)	128

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