You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 1-[2-(3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl)-2-phenylethyl]-3-(9-oxofluoren-2-yl)urea into its molecular formula.
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C31H25N3O4
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