Table 6. Hydrogen-bond geometry (Å, °) for 3 .

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯N2i	0.861 (18)	2.099 (19)	2.9454 (16)	167.6 (15)
N1—H1B⋯O1ii	0.882 (19)	2.01 (2)	2.8832 (15)	170.9 (17)

Symmetry codes: (i) ; (ii) .