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system
Provide the molecular formula for the IUPAC named substance [(2S)-2-[5-ethyl-7-(trifluoromethyl)pyrazolo[1,5-a]pyrimidin-2-yl]pyrrolidin-1-yl]-(3-methyl-1,2-oxazol-5-yl)methanone .
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C18H18F3N5O2
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