Hydrogen bonds donated by the free water molecules W5, W6 and W7. All the distances and angles, D and α, are given in Å and deg, respectively.

Water molecule	Hydrogen bond (A–H⋯B)	D (A–H)	D (H⋯B)	α (A–H⋯B)
W5	OW5–H5A⋯O9	0.974	2.254	163.3
	OW5–H5B⋯O11	0.977	2.215	136.3
	OW5–H5B⋯O2	0.977	2.282	111.1
W6	OW6–H6A⋯O7	0.978	1.809	162.7
	OW6–H6B···OW7	0.981	1.884	159.6
W7	OW7–H7A⋯O7	0.982	1.843	169.1
	OW7–H7A⋯O11	0.975	2.127	146.8
	OW7–H7A⋯O2	0.975	2.407	111.7