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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O5—H5⋯O4	0.86 (6)	2.13 (6)	2.696 (3)	123 (5)
O5—H5⋯O3i	0.86 (6)	2.24 (6)	2.703 (3)	114 (4)
C1—H1⋯O5ii	0.98	2.48	3.371 (3)	152
C4—H4⋯O6	0.98	2.39	3.074 (4)	126

Symmetry codes: (i) ; (ii) .