You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(2,5-dimethoxyphenyl)-2-[3-[(4-fluorophenyl)methyl]triazolo[4,5-d]pyrimidin-7-yl]sulfanylacetamide into its molecular formula.
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C21H19FN6O3S
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