You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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ethyl 2-[(5Z)-2,4-dioxo-5-(3H-pyrrol-5-ylmethylidene)-1,3-thiazolidin-3-yl]acetate is the IUPAC name of a molecule. Please give its molecular formula.
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C12H12N2O4S
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