You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (5E)-5-[[5-(2,6-dichlorophenyl)furan-2-yl]methylidene]-3-[2-(4-methoxyphenyl)ethyl]-2-sulfanylidene-1,3-thiazolidin-4-one by IUPAC nomenclature, provide its molecular formula.
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C23H17Cl2NO3S2
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