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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N5—H5C⋯O4i	0.86	2.32	3.131 (5)	158
N5—H5B⋯N3ii	0.86	2.20	3.050 (5)	172
N2—H2B⋯O2	0.86	2.50	3.077 (5)	126
N2—H2A⋯N6iii	0.86	2.30	3.147 (5)	169

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