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

Cg4 is the centroid of the C7–C12 ring.

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N2—H2⋯N19i	0.91 (3)	2.28 (3)	3.152 (3)	163 (3)
N6—H6B⋯N14ii	0.89 (3)	2.17 (4)	3.033 (3)	164 (3)
N6—H6A⋯Cg4iii	0.91 (3)	2.62 (4)	3.405 (2)	145 (3)

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