You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[(4S)-2',5'-dioxospiro[6,7-dihydro-5H-1-benzothiophene-4,4'-imidazolidine]-1'-yl]-N-[(2S)-3-methylbutan-2-yl]acetamide into its molecular formula.
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C17H23N3O3S
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