You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule N-[(1R)-1-(1,3-benzodioxol-5-yl)ethyl]-2-[(3R)-2',5'-dioxospiro[1,2-dihydroindene-3,4'-imidazolidine]-1'-yl]acetamide into molecular formula.
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C22H21N3O5
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