You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3-cyanophenyl) N-[(Z)-2-[(4R)-4-amino-8-azaspiro[4.5]decan-8-yl]-2-(methylideneamino)ethenyl]ethanimidothioate into its molecular formula.
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C21H27N5S
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