You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (4S)-1-ethyl-4-[(3S)-3-[5-methyl-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidin-2-yl]pyrrolidine-1-carbonyl]pyrrolidin-2-one is given. What is its corresponding molecular formula?
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C19H22F3N5O2
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