You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4E)-1-(4-bromophenyl)-4-[(5-chloro-2-methoxyphenyl)methylidene]pyrazolidine-3,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
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C17H12BrClN2O3
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