You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl 4-benzyl-2-(2-methylsulfanylethyl)-3-oxo-1,4,8-triazaspiro[4.5]decane-8-carboxylate into its molecular formula.
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C22H33N3O3S
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