You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-(5-acetamido-2',5'-dioxospiro[1,3-dihydroindene-2,4'-imidazolidine]-1'-yl)-N-(1-cyclopropylethyl)-N-[(4-fluorophenyl)methyl]acetamide into molecular formula.
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C27H29FN4O4
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