[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is the conjugate base of trans-caffeic acid; major species at pH 7.3. It has a role as a human metabolite. It is a conjugate base of a trans-caffeic acid."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][S][=C][Branch1][N][C][=C][Ring1][=Branch1][/C][=C][/C][=Branch1][C][=O][O][O][O-1]"}]