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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯N1	0.88 (3)	1.83 (3)	2.643 (2)	153 (3)
N2—H2A⋯N4i	0.89 (3)	2.40 (3)	3.156 (3)	142 (2)
N2—H2B⋯N3ii	0.88 (3)	2.26 (3)	3.098 (3)	159 (2)

Symmetry codes: (i) ; (ii) .