You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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(4E)-1-(3-chloro-4-fluorophenyl)-4-[hydroxy-[3-(2-methylpropoxy)phenyl]methylidene]-5-phenylpyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
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C27H23ClFNO4
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