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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N3—H3⋯O1i	0.86	2.24	3.054 (7)	159
N7—H7⋯O3ii	0.86	2.21	2.982 (7)	150
O2—H2⋯N4	0.84	1.79	2.503 (8)	141
O4—H4⋯N8	0.84	1.82	2.529 (8)	141

Symmetry codes: (i) ; (ii) .