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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N7—H7B⋯N3i	0.86	2.62	3.449 (5)	164
O9—H9⋯N8ii	0.82	2.12	2.829 (5)	145

Symmetry codes: (i) ; (ii) .