You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-(difluoromethyl)-5-(4-methylphenyl)-N-(1,3,5-trimethylpyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H20F2N6O
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