You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[4-[[(2-methylpropan-2-yl)oxycarbonylamino]methyl]piperidin-1-yl]ethyl N-ethylpyridine-2-carboximidothioate into its molecular formula.
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C21H34N4O2S
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