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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1A⋯O2	0.839 (18)	1.993 (19)	2.8017 (19)	161.8 (17)
O2—H2A⋯O1i	0.86 (2)	1.86 (2)	2.7180 (18)	174 (2)

Symmetry code: (i) .