[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a sulfur-containing carboxylic consisting of thioglycolic acid carrying an S-methyl substituent. It has a role as a xenobiotic metabolite. It is a sulfur-containing carboxylic acid, a monocarboxylic acid and a methyl sulfide. It is functionally related to a thioglycolic acid. It is a conjugate acid of a (methylthio)acetate."}, {"from": "gpt", "value": "[C][S][C][C][=Branch1][C][=O][O]"}]