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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N5—H1N5⋯N3i	0.91 (3)	2.14 (3)	3.040 (3)	173 (2)
C7—H7B⋯N3ii	0.99	2.57	3.548 (2)	172
C8—H8A⋯N2iii	0.95	2.39	3.274 (2)	155

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