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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O1—H1⋯O4i	0.82	1.80	2.613 (3)	170
O3—H3⋯O2ii	0.82	2.01	2.825 (3)	173
O4—H4⋯O3iii	0.82	1.94	2.752 (3)	172
C1—H1B⋯O2	0.97	2.44	2.889 (4)	108
C5—H5B⋯O1	0.97	2.51	3.054 (4)	116
C6—H6B⋯O4	0.97	2.52	2.901 (3)	104
C16—H16A⋯O3	0.96	2.46	2.809 (4)	101

Symmetry codes: (i) ; (ii) ; (iii) .