[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a modified amino acid that is used as an antidote for acetaminophen overdose to prevent hepatic injury. Acetylcysteine is a hepatoprotective agent and has not been linked to significant serum enzyme elevations during therapy or to instances of clinically apparent acute liver injury."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][S][C][=Branch1][C][=O][O]"}]