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 ethyl (2Z)-2-[(5S)-5-[(2-chlorophenyl)methyl]-3-(4-fluorophenyl)-4-oxo-1,3-thiazolidin-2-ylidene]-2-cyanoacetate is given. What is its corresponding molecular formula?
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C21H16ClFN2O3S
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