[{"from": "human", "value": "Describe this molecule. [C][=Branch1][C][=O][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][O][C][=Branch1][C][=O][C][Branch1][S][C][Branch1][=Branch2][C][Branch1][C][F][Branch1][C][F][F][Branch1][C][F][F][Branch1][C][F][F]"}, {"from": "gpt", "value": "The molecule is an acyclic carboxylic anhydride that is perfluorinated butyric anhydride. It is used as a derivatising reagent for gas chromatographic analyses. It has a role as a chromatographic reagent. It is an organofluorine compound and an acyclic carboxylic anhydride. It is functionally related to a butyric acid."}]