You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named N-(3,4-dimethylphenyl)-3-[5-[(2-fluorophenyl)methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]propanamide is given. What is its corresponding molecular formula?
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C21H19FN2O2S2
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