You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 7-(difluoromethyl)-5-(4-fluorophenyl)-N-(2-methyl-4-nitrophenyl)pyrazolo[1,5-a]pyrimidine-3-carboxamide .
user
C21H14F3N5O3
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