[{"from": "human", "value": "What can you tell me about this molecule? [C@@H1][Branch2][Ring2][#C][C@H1][Branch2][Ring2][#Branch2][C@H1][Branch2][Ring1][P][O][C@@H1][Branch1][Branch1][C@@H1][Ring1][=Branch1][O][O][C@@H1][C@@H1][Branch2][Ring1][C][C@H1][Branch1][=C][C][Branch1][#Branch2][O][C@@H1][Ring1][=Branch1][C][=Branch1][C][=O][O-1][O][O][O][C][=Branch1][C][=O][O-1][O][O]"}, {"from": "gpt", "value": "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."}]