You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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(4Z)-4-[(3,4-dichlorophenyl)-hydroxymethylidene]-1-[(4-methoxyphenyl)methyl]-5-phenylpyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
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C25H19Cl2NO4
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