You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[3-[ethyl(methyl)amino]phenyl]-3-(2,5,7-trimethylpyrazolo[1,5-a]pyrimidin-6-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H27N5O
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