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 1-ethyl-3-[2-(1-ethylpiperidin-4-yl)ethyl]-2-[[4-(2,2,2-trifluoroethoxy)phenyl]methyl]guanidine into molecular formula.
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C21H33F3N4O
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