[{"from": "human", "value": "Describe this molecule. [C][Branch1][#Branch2][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][S]"}, {"from": "gpt", "value": "The molecule is the conjugate base of 3-mercaptopyruvic acid. It has a role as a human metabolite. It is a conjugate base of a 3-mercaptopyruvic acid."}]