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 carbohydrate acid anion arising from deprotonation of both carboxy groups of 4-(alpha-D-galactopyranuronosyl)-D-galactopyranuronic acid; major species at pH 7.3. It is a carbohydrate acid anion, a dicarboxylic acid dianion and a digalacturonate. It is a conjugate base of an alpha-D-GalpA-(1->4)-D-GalpA.