You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (4E)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-5-(1-methylindol-3-yl)-1-propylpyrrolidine-2,3-dione by IUPAC nomenclature, provide its molecular formula.
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C25H26N2O4
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