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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1n⋯N2	0.87 (2)	2.34 (2)	2.7162 (19)	107 (1)
N1—H1n⋯N3i	0.87 (2)	2.33 (2)	3.146 (2)	156 (2)
C5—H5⋯N2ii	0.95	2.60	3.212 (2)	123
C7—H7A⋯O1iii	0.99	2.44	3.180 (2)	131
C7—H7B⋯O1iv	0.99	2.42	3.337 (2)	153

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