[{"from": "human", "value": "Provide a brief overview of this molecule. [C][O][C][=Branch1][C][=O][C@@H1][C@H1][Branch1][S][C@@H1][Branch1][N][C@H1][Branch1][Branch2][C][Branch1][Ring2][O][Ring1][=Branch1][O][O][O][O]"}, {"from": "gpt", "value": "The molecule is a carbohydrate acid ester resulting from the formal condensation of the carboxy group of D-glucuronic acid with methanol. It is a methyl ester and a carbohydrate acid ester."}]