[{"from": "human", "value": "Provide a description of this molecule. [C][C@@H1][Branch2][Ring1][Ring2][C@H1][Branch1][S][C@@H1][Branch1][Ring2][O][Ring1][Branch1][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][O][O][O]"}, {"from": "gpt", "value": "The molecule is a carbohydrate acid anion that is the conjugate base of 3,6-anhydro-L-galactonic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It has a role as a marine metabolite. It is functionally related to a L-galactonate."}]