[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=Branch1][C][=O][N][C][=C][C][=Branch1][=Branch2][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][O][S][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is an alpha-amino acid zwitterion that is S-(5-acetamido-2-hydroxyphenyl)cysteine in which a proton has been transferred from the carboxy group to the amino group. It is the major species at pH 7.3. It has a role as a human xenobiotic metabolite. It is a tautomer of a S-(5-acetamido-2-hydroxyphenyl)cysteine."}]