DXI beta-D-glucopyranosyl-(1->4)-beta-D-galactopyranosyl-(1->4)-alpha-D-glucopyranose C([C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O[C@H]2[C@H](O[C@H]([C@@H]([C@H]2O)O)O[C@@H]3[C@H](O[C@@H]([C@@H]([C@H]3O)O)O)CO)CO)O)O)O)O