You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-[[4-(3,4-dichlorophenyl)thiophen-2-yl]methylidene]-2-sulfanylidene-3-[4-(2H-tetrazol-5-yl)butyl]-1,3-thiazolidin-4-one by IUPAC nomenclature, provide its molecular formula.
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C19H15Cl2N5OS3
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