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

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O9—H7⋯O1i	0.81	2.04	2.818 (2)	162
O1—H8⋯O10	0.82	1.98	2.740 (2)	156
O10—H10⋯O9i	0.84	1.85	2.686 (2)	177
O11—H1⋯O4ii	0.87	1.94	2.812 (2)	177

Symmetry codes: (i) ; (ii) .