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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O1	0.81 (3)	2.21 (3)	2.604 (2)	110 (2)
N2—H2⋯O1i	0.88 (2)	2.06 (2)	2.920 (2)	166 (2)

Symmetry code: (i) .