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 5-[[4-(2,4-dinitrophenoxy)-3-methoxyphenyl]methylidene]-3-methyl-2-sulfanylidene-1,3-thiazolidin-4-one is given. What is its corresponding molecular formula?
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C18H13N3O7S2
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