Table 4. Hydrogen-bond geometry (Å, °) for (II) .

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯O3i	0.84 (3)	1.80 (3)	2.6230 (16)	164 (3)
O4—H4⋯O2ii	0.85 (3)	1.88 (3)	2.7116 (16)	164 (2)

Symmetry codes: (i) ; (ii) .