[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a fluoroamino acid that is lysine with a difluoromethyl group at position 2. It has a role as a metabolite. It is functionally related to a lysine."}, {"from": "gpt", "value": "[C][Branch1][Ring2][C][C][N][C][C][Branch1][=Branch1][C][Branch1][C][F][F][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}]