You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[3-[5-amino-4-cyano-1-(4-fluorophenyl)pyrazol-3-yl]propyl]-2-bromo-4-fluorobenzamide is the IUPAC name of a molecule. Please give its molecular formula.
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C20H16BrF2N5O
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