[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a monocarboxylic acid that is perfluorinated hexanoic acid. It has a role as an environmental contaminant and a xenobiotic. It is functionally related to a hexanoic acid."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][Branch2][Ring2][#Branch1][C][Branch2][Ring1][#C][C][Branch2][Ring1][#Branch1][C][Branch1][S][C][Branch1][=Branch2][C][Branch1][C][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][C][F][F][O]"}]