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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O3i	0.89 (4)	2.05 (4)	2.943 (4)	175 (3)
N2—H2⋯O1ii	0.81 (4)	2.33 (4)	3.037 (5)	146 (3)
N2—H2⋯O1iii	0.81 (4)	2.50 (4)	3.196 (5)	145 (3)

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