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 N-[[5-[5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4H-1,2-oxazol-3-yl]-3-methylthiophen-2-yl]methyl]oxolane-3-carboxamide into molecular formula.
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C21H19Cl2F3N2O3S
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