You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[2-bromo-4-[(E)-4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-enyl]phenyl]-N',N'-dimethyl-4-oxobutanehydrazide is the IUPAC name of a molecule. Please give its molecular formula.
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C22H19BrCl3F3N2O2
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