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 methyl 2-[[[2-(3-fluoroanilino)-2-oxoethyl]-methylamino]methyl]-5-methyl-4-oxo-3H-thieno[2,3-d]pyrimidine-6-carboxylate into molecular formula.
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C19H19FN4O4S
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