[{"from": "human", "value": "Describe this molecule. [C][S][C][=Branch1][C][=O][C@@H1][Branch1][O][C][O][P][=Branch1][C][=O][Branch1][C][O][O][O]"}, {"from": "gpt", "value": "The molecule is the methyl thiolester of 3-phospho-1-thio-D-glyceric acid. It is a carbohydrate acid ester, an aldonate ester phosphate and a thioester. It is a conjugate acid of a S-methyl 3-O-phosphonato-1-thio-D-glycerate(2-)."}]