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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4A⋯O6	0.82	1.87	2.693 (2)	176
O5—H5A⋯O2	0.82	1.86	2.581 (2)	147
O6—H6C⋯O3i	0.96 (2)	1.85 (2)	2.810 (3)	178 (3)
O6—H6D⋯O5ii	0.96 (2)	1.95 (2)	2.887 (2)	164 (2)

Symmetry codes: (i) ; (ii) .