You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(2,4-dichlorophenoxy)-N-[[4-(dimethylamino)phenyl]methyl]-N-[(3R)-1,1-dioxothiolan-3-yl]acetamide into its molecular formula.
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C21H24Cl2N2O4S
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