You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (4Z)-4-[(5-bromo-2-hydroxyphenyl)methylidene]-2-methyl-5-oxo-1-(1-phenylethyl)pyrrole-3-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
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C22H20BrNO4
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