[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an alpha-amino-acid radical derived from cysteine. It is functionally related to a cysteine."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][SH0]"}]