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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H3⋯O1	0.939 (16)	1.83 (2)	2.601 (1)	137.8 (13)
O2—H2⋯O1i	0.84	1.75	2.583 (1)	174 (1)

Symmetry code: (i) .