You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[[3-chloro-4-[(2-chloro-6-fluorophenyl)methoxy]-5-ethoxyphenyl]methyl]-3-methoxypropan-1-amine into molecular formula.
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C20H24Cl2FNO3
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