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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N7—H71⋯N1i	0.78 (3)	2.38 (3)	3.087 (3)	153 (3)
N7—H72⋯N3ii	0.91 (4)	2.19 (4)	3.088 (3)	171 (3)

Symmetry codes: (i) ; (ii) .