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 N-[4-chloro-3-(trifluoromethyl)phenyl]-5-[(3S)-1-ethyl-5-oxopyrrolidin-3-yl]-7-oxo-1H-pyrazolo[1,5-a]pyrimidine-3-carboxamide into its molecular formula.
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C20H17ClF3N5O3
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