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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1B⋯N4i	0.86	2.28	3.139 (4)	175
N1—H1A⋯Cg1ii	0.86	2.84	3.608 (4)	150

Symmetry codes: (i) ; (ii) . Cg1 is the centroid of the benzene ring.