[{"from": "human", "value": "Generate a molecule based on this description. The molecule is an S-substituted N-acetyl-L-cysteine arising from formal 1,4-addition of the side-chain sulfur atom to N-ethylmaleimide. It is a S-substituted N-acetyl-L-cysteine and an organic sulfide. It is functionally related to a N-ethylsuccinimide."}, {"from": "gpt", "value": "[C][C][N][C][=Branch1][C][=O][C][C][Branch1][Branch1][C][Ring1][=Branch1][=O][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][=Branch1][C][=O][C]"}]