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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1D⋯O2	0.863 (9)	2.052 (10)	2.8971 (17)	166.0 (19)
N4—H4B⋯N2i	0.865 (9)	2.342 (12)	3.160 (2)	157.9 (19)
N4—H4A⋯O1ii	0.868 (9)	2.216 (11)	3.061 (2)	164.2 (19)
N3—H3D⋯O1iii	0.857 (9)	2.018 (10)	2.8599 (17)	167.1 (19)
N2—H2B⋯O2iv	0.867 (10)	2.255 (13)	3.065 (2)	155 (2)
N2—H2A⋯O2v	0.863 (10)	2.400 (15)	3.152 (2)	145.7 (19)

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