SMILES: [C@@H]1([C@H]([C@H](O[C@@H]([C@@H]1O)O[C@@H]2[C@@H]([C@H](C(O[C@@H]2C(=O)O)O)O)O)C(=O)O)O)O
Description: The molecule is a digalacturonic acid in which an alpha-D-galactopyranuronic acid unit is joined to a D-galactopyranuronic acid unit via an alpha-(1->4)-linkage. It is a conjugate acid of an alpha-D-galacturonosyl-(1->4)-D-galacturonate(2-).