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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N3—H3A⋯O7i	0.86	2.12	2.967 (4)	168
N6—H6A⋯O14ii	0.86	2.05	2.906 (4)	177
N7—H7B⋯O3	0.86	1.99	2.619 (6)	129
N8—H8D⋯O11	0.86	2.08	2.654 (5)	123

Symmetry codes: (i) ; (ii) .