You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Can you give the molecular formula of the molecule ethyl 2-[(5Z)-4-oxo-5-[(4-propan-2-ylphenyl)methylidene]-2-sulfanylidene-1,3-thiazolidin-3-yl]propanoate ?
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C18H21NO3S2
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