You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(2-cyclopropylpropan-2-yl)-2-(3,3-difluoropiperidin-1-yl)-4-ethylimidazo[1,5-a]pyrimidine-8-carboxamide into its molecular formula.
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C20H27F2N5O
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