You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name (3S,4S)-1-(2,2-difluoroethyl)-N-(2,3-difluorophenyl)-2-oxo-4-[3-(trifluoromethyl)phenyl]pyrrolidine-3-carboxamide into its molecular formula.
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C20H15F7N2O2
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