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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N—H1⋯O1i	0.86	2.09	2.948 (2)	172
O2—H2⋯O1ii	0.82	1.95	2.675 (2)	147
O4—H4⋯O2iii	0.82	2.00	2.721 (2)	147

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