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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H42⋯O1iii	0.84 (3)	1.94 (3)	2.7582 (17)	163 (2)
O4—H41⋯O2iv	0.76 (3)	2.03 (3)	2.7874 (17)	171 (2)
O3—H31⋯O1v	0.88 (3)	1.97 (3)	2.7716 (16)	151 (2)
O3—H32⋯O2i	0.77 (3)	2.10 (3)	2.8265 (16)	158 (2)

Symmetry codes: (i) ; (iii) ; (iv) ; (v) .