You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[2-(3-bromo-4-fluorophenyl)imino-2-(hydroxyamino)acetyl]-N-[(2-cyanopyridin-4-yl)methyl]piperidine-1-carboxamide into its molecular formula.
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C21H20BrFN6O3
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