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 (5Z)-3-(3,4-dimethylphenyl)-5-[[5-(4-fluorophenyl)-1H-pyrazol-4-yl]methylidene]-2-imino-1,3-thiazolidin-4-one into molecular formula.
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C21H17FN4OS
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