Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
N1—H1⋯O2	0.88	1.88	2.596 (4)	137
O2—H2⋯O2i	0.89 (5)	1.61 (9)	2.467 (4)	160 (14)
O3—H3⋯O1ii	0.95 (4)	1.90 (4)	2.788 (5)	155 (4)

Symmetry codes: (i) ; (ii) .