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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O12—H121⋯O8i	0.82	1.95	2.769 (4)	177
O11—H111⋯O12ii	0.84	1.96	2.781 (4)	168
O6—H61⋯O4iii	0.84	1.91	2.747 (4)	174
O8—H81⋯O6i	0.82	1.93	2.739 (4)	169

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