You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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7-[chloro(difluoro)methyl]-N-(2,6-dibromo-4-nitrophenyl)-5-methylpyrazolo[1,5-a]pyrimidine-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C15H8Br2ClF2N5O3
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