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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4A⋯O2	0.86 (2)	2.08 (3)	2.910 (5)	160 (7)
O3—H3B⋯O1ii	0.82 (2)	2.11 (2)	2.883 (3)	156 (4)
O3—H3A⋯O2iii	0.84 (2)	1.94 (2)	2.783 (4)	172 (4)

Symmetry codes: (ii) ; (iii) .