You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[(3,4-dimethoxyphenyl)methyl]-N-ethyl-2-[5-(trifluoromethyl)pyridin-2-yl]sulfanylacetamide into its molecular formula.
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C19H21F3N2O3S
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