You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-(6-ethoxy-1,3-benzothiazol-2-yl)-2-[(5Z)-5-[(4-fluorophenyl)methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetamide into its molecular formula.
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C21H16FN3O3S3
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