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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O1	0.907 (10)	1.84 (3)	2.582 (3)	137 (3)
N2—H2⋯O1i	0.86	2.43	3.043 (3)	129

Symmetry code: (i) .